Introduction
The UK’s national debt has become one of the most difficult economic challenges facing the country. It is a problem that has accumulated over decades rather than being created by any one government, and it has become increasingly complicated by an ageing population, relatively weak productivity growth, rising demands on the NHS and social care, higher defence requirements and the growing cost of servicing government debt.
The scale of the challenge can sometimes make the problem appear almost impossible. It is tempting to think that the government needs to find hundreds of billions of pounds of spending cuts or dramatically increase taxes. In reality, neither approach on its own is likely to work. Excessive spending cuts could damage economic growth, while very large tax increases could discourage investment and reduce the tax base on which the government depends.
The more realistic answer is to think about the national debt as a long-term economic management problem. Britain does not need to eliminate its debt. Instead, it needs to create an economy that grows faster than the debt, while gradually bringing government borrowing under control. If that could be sustained for 15 or 20 years, the debt-to-GDP ratio could fall substantially without requiring an economically damaging programme of extreme austerity.
Economic Growth Is Probably the Most Important Part of the Answer
The most powerful way of reducing the burden of government debt is to make the economy larger. This is because government debt needs to be considered relative to the size of the economy rather than simply as a standalone number.
For illustration, imagine that the UK has a GDP of £2.5 trillion and government debt of £2.4 trillion. The debt would be equivalent to approximately 96% of GDP. Now suppose that over the following decade the economy grows to £3.5 trillion while government debt increases only modestly to £2.5 trillion. The debt ratio would then have fallen to around 71%, despite the government barely reducing the nominal amount of debt.
This demonstrates why economic growth is so important. The government does not necessarily need to find £1 trillion to repay debt. It needs to create the conditions in which the economy becomes sufficiently larger that the existing debt represents a progressively smaller burden.
The problem for Britain is that productivity growth has been relatively weak for many years. Productivity matters because it determines how much economic output can be generated from the country’s workforce, capital and resources. If British businesses can produce more with the same number of employees, wages can rise, company profits can increase, investment can grow, and the government can collect more tax without necessarily increasing tax rates.
This makes policies such as planning reform, infrastructure investment, skills development, technological innovation and energy security much more important to the debt problem than they might initially appear. A new railway, for example, is not simply a transport project. If it allows people to travel more easily to work, enables businesses to recruit from a larger labour market and encourages companies to invest around new transport links, it can increase the productive capacity of the economy for decades.
The same principle applies to housing. If Britain makes it easier to build homes in economically productive areas, it can reduce housing shortages while also creating construction activity, employment and investment. Over time, those additional workers and businesses contribute to the tax base.
Economic growth therefore provides something that austerity cannot easily provide: a way of reducing the relative burden of debt without making the economy itself smaller.
The NHS Needs to Become More Productive, Not Simply Smaller
The NHS illustrates the difficulty of trying to reduce government debt through conventional spending cuts. Healthcare is one of the largest areas of public expenditure, and demand is likely to continue rising as the population ages and medical treatments become more sophisticated.
Simply cutting NHS spending would therefore risk creating longer waiting lists, poorer services and potentially higher costs elsewhere in the system. If people cannot access treatment early, relatively inexpensive health problems can eventually become much more expensive conditions requiring hospital treatment.
The better approach is to ask whether the NHS can deliver more healthcare from the resources it already receives.
Technology could become increasingly important in achieving this. Artificial intelligence and automation could reduce administrative work, improve appointment systems, help doctors interpret diagnostic information and allow hospitals to manage capacity more effectively. These technologies will not solve every problem, but even relatively modest improvements in productivity, repeated across a health service employing more than a million people, could have a significant financial effect.
Prevention is equally important. If patients at risk of diabetes, heart disease or other chronic conditions can be identified and treated earlier, some serious illnesses and hospital admissions can potentially be avoided. The financial benefit is not immediate, but over a ten- or twenty-year period it could be considerable.
The objective should therefore not be to ask how Britain can spend less on healthcare, but how it can get more healthcare for every pound it spends. That is a much more sustainable approach to reducing the long-term cost of public services.
Getting More People Into Work Could Transform the Finances
One of the less obvious elements of Britain’s fiscal problem is the number of working-age people who are economically inactive, particularly because of long-term health problems.
This matters because the government faces a double financial effect. It may have to provide benefits and other support while simultaneously losing the income tax and National Insurance contributions that those people could otherwise generate.
The potential economic benefit of helping people return to work is therefore much greater than simply reducing the welfare bill. A person who returns to employment may stop receiving certain benefits, begin paying income tax and National Insurance, contribute to economic output and spend more money in the wider economy.
This does not mean that everyone receiving health-related benefits should be pushed into employment. Many people genuinely cannot work, and any reform would need to distinguish between those who are unable to work and those who could return to employment if they received appropriate medical, financial or workplace support.
Nevertheless, increasing labour-force participation could become one of Britain’s most powerful methods of increasing GDP without relying entirely on immigration. It would simultaneously improve the public finances and reduce some of the social costs associated with long-term economic inactivity.
Pensions Are the Difficult Problem That Governments Cannot Avoid Forever.
If Britain is serious about reducing its debt over the long term, pensions will almost certainly have to form part of the discussion. This is not because pensions are inherently too generous, but because the demographics of the country are changing.
People are living longer, while birth rates are relatively low. That means the proportion of the population receiving pensions is increasing relative to the number of people working and paying taxes.
The basic arithmetic is straightforward. If ten workers once supported three pensioners, but demographic change eventually produces eight workers supporting four pensioners, each worker is effectively carrying a much greater financial burden.
There are several possible responses. Governments could gradually increase the state pension age, encourage later retirement, improve private pension saving and reconsider whether every pension-related benefit should remain equally generous regardless of an individual’s other income and wealth.
The important point is that any changes should be gradual. A person approaching retirement has little opportunity to alter their financial plans if the rules suddenly change. Someone in their forties, however, has decades to adjust their savings and retirement plans.
This is therefore an area where long-term political planning is far more important than short-term political popularity.
Britain Will Probably Need More Tax Revenue
Even with significant spending reform, it is difficult to see how Britain can solve its debt problem entirely through expenditure reductions. Some increase in government revenue is likely to be necessary.
However, this does not necessarily mean simply increasing income-tax rates. Higher marginal tax rates can affect incentives to work, invest and establish businesses, particularly if they become internationally uncompetitive.
A better approach could be to examine the structure of taxation and broaden the tax base. Property taxation, capital gains, inheritance-tax reliefs and pension tax advantages could all be examined to determine whether they continue to produce the economic and social outcomes originally intended.
There is also considerable potential to improve tax collection. Better use of data and artificial intelligence could make it easier to identify VAT fraud, undeclared income and other forms of tax evasion.
The objective should be to increase revenue while doing as little damage as possible to economic growth. A tax system that collects more money today but significantly reduces investment and productivity tomorrow could ultimately make the debt problem worse.
Immigration Is More Complicated Than It Appears
Immigration has become one of the most politically controversial issues in Britain, but its relationship with the national debt is considerably more complicated than the political debate sometimes suggests.
It is certainly true that population growth creates additional demand for housing, schools, healthcare, transport and other public services. However, immigrants are also workers and taxpayers. Many sectors of the British economy, including healthcare, social care, engineering, construction and hospitality, rely heavily on people born outside the UK.
This creates a difficult balancing act. If immigration were reduced substantially while the UK simultaneously experienced an ageing population and low birth rates, the number of workers supporting the retired population could decline.
The fiscal question is therefore not simply whether immigration is good or bad. It is whether Britain has the right level and composition of immigration for its economic needs, while simultaneously doing more to increase participation among people already living in the UK.
A sensible policy would therefore combine managed immigration with stronger domestic workforce participation rather than treating immigration as a substitute for economic and social reform.
Government Itself Needs to Become More Efficient
Another important part of the answer lies within government itself. The public sector spends enormous sums on procurement, technology, property, consultancy and outsourced services. Even relatively small efficiency improvements can therefore produce substantial savings.
For example, if government departments collectively spent £100 billion on procurement, a 5% improvement in efficiency would theoretically represent £5 billion. That would not necessarily require cutting services. It could come from better contract management, greater competition, standardised technology platforms and eliminating duplication between departments.
The same argument applies to the civil service more generally. Digital technology and artificial intelligence could eventually automate many routine administrative activities. The most effective approach would not necessarily be to replace huge numbers of employees, but to allow the existing workforce to process more work and concentrate on more complicated decisions.
This is an area where Britain has an opportunity to learn from the private sector. Large companies routinely use technology to automate repetitive processes, analyse data and improve customer service. Government has been much slower to transform some of its legacy systems and processes.
If the state could become even modestly more productive, the savings over twenty years could be substantial.
Selling Assets Can Help, But It Is Not a Solution
The government also owns significant amounts of land, property and other assets. Selling surplus assets could provide a useful one-off reduction in debt.
However, this needs to be kept in perspective. Selling £10 billion of government property and using the proceeds to repay debt would reduce the debt by £10 billion, but it would not change the underlying relationship between government revenue and expenditure.
It is rather like a household selling a second car to reduce its mortgage. The balance sheet improves, but the household’s monthly income and expenditure remain the same.
Asset sales can therefore be useful, particularly where the assets are genuinely surplus to requirements, but they should not be used to disguise an underlying structural deficit.
Britain Ultimately Needs a Primary Surplus
The long-term objective should be for the government to generate a primary surplus. In simple terms, that means government revenue exceeds government expenditure before interest payments on existing debt are taken into account.
For example, if the government collected £1.1 trillion but spent £1.05 trillion on public services and other programmes, it would have a primary surplus of £50 billion. It would still have to pay interest on existing debt, but at least its underlying finances would be moving in the right direction.
Maintaining a primary surplus over a long period would allow the debt ratio to gradually decline.
This is why the UK’s debt problem should be viewed as a 15- to 20-year project rather than something that can be solved in a single Budget or Parliament.
The first objective should be to stabilise debt relative to GDP. Once that has been achieved, government could aim for modest primary surpluses and gradually reduce the debt ratio.
A realistic long-term ambition might be to move from something around 95% of GDP towards 70%, and potentially lower over a much longer period.
The Wrong Ways to Solve the Problem
There are several apparently attractive solutions that could create more problems than they solve.
Massive austerity could reduce government spending, but if it caused the economy to contract significantly, tax revenues would fall, and unemployment and welfare spending could rise.
Similarly, large unfunded tax cuts might stimulate parts of the economy, but if investors believed that government borrowing was becoming unsustainable, interest rates could rise and undermine the benefit of the tax reductions.
Simply selling government assets would only provide a temporary solution, while relying on monetary financing or “printing money” could generate inflation and undermine confidence in sterling.
Perhaps the biggest mistake would be to look for a single culprit. Britain’s debt problem is not caused solely by the NHS, welfare, pensions, immigration, taxation or government inefficiency. It is the result of several structural pressures operating simultaneously.
Conclusion: A 20-Year National Project
The UK’s national debt cannot realistically be eliminated through one dramatic programme of spending cuts or taxation. The problem is simply too large and too deeply embedded in the structure of the British economy.
The most credible solution would instead be a long-term national strategy combining economic growth with fiscal discipline.
Britain needs to become more productive, get more people into work, reform public services so that they deliver better outcomes for the money invested in them, address the long-term cost of pensions and welfare, improve government procurement and administration, and raise additional tax revenue where necessary.
At the same time, government needs to distinguish between borrowing that creates future economic capacity and borrowing that simply finances today’s consumption. Borrowing to build infrastructure, housing, energy systems or technology that increases future productivity can potentially be justified. Borrowing indefinitely to fund everyday spending is much harder to defend.
Ultimately, the mathematics are quite simple.
Britain needs to create a virtuous circle in which: “higher productivity → stronger economic growth → higher tax revenues → lower borrowing → falling debt → lower interest costs → greater investment capacity → stronger growth.”
The alternative is a vicious circle: “weak growth → weak tax revenues → higher borrowing → higher debt → higher interest payments → less money available for investment → weaker growth”
The real challenge for Britain’s politicians is therefore not simply “How do we cut the national debt?” It is: “How do we build an economy that grows fast enough for the national debt to become progressively less burdensome, while ensuring that government lives within its means?”
That is a much harder question, because it requires decisions that may take years to produce results and may be unpopular in the short term.
But it is also the only approach that is likely to be sustainable.
Britain does not need to become a country with no debt. It needs to become a country in which debt is manageable, the economy is growing, public services are productive, and the government is no longer structurally dependent on borrowing to fund everyday expenditure.
If that could be achieved over the next twenty years, the UK could move from a position in which debt approaches the size of the entire economy towards one in which debt represents perhaps 60–70% of GDP.
That would not be an overnight miracle.
It would be something more valuable: a sustainable improvement in Britain’s economic position that could be maintained by governments of different political persuasions and passed on to the next generation.
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