Every July the OBR publishes fiscal projections looking fifty years ahead. Each year the headline is the same. The public finances are on an unsustainable path, and if nothing is done government debt will be at some record level in half a century’s time. It’s a signal for general hand wringing.
The first point to make is that this has nothing to do with current government policy. This Telegraph headline is predictably silly, unless they believe Burnham will be Prime Minister for a very long time. The UK’s fiscal rules ensure that current policy is sustainable. Instead the report is about longer term trends in government spending and tax receipts. As the report says repeatedly, it is not a forecast because the government will act to ensure that debt remains sustainable.
It is also wrong to say that it’s just not possible to forecast fifty years ahead so the numbers are meaningless. This is not a normal macroeconomic forecast. For reasons that I will discuss below, the assumptions made about long term GDP growth are not central to the analysis, even though the report spends a considerable amount of time on them.
Instead the interest lies in what the critical long term fiscal pressures are, and what they might imply for future governments. Most of these pressures are on the spending side, as a simplified version of the reports Table 3.1 below shows
OBR’s Central Fiscal 50 year Projection: source
% of GDP |
FY 2030/1 |
FY 2075/6 |
Health |
8.4 |
13.5 |
Adult Social Care |
1.2 |
1.8 |
Education |
4.3 |
3.4 |
State Pension |
5.0 |
8.6 |
Other welfare benefits |
6.2 |
6.4 |
Public sector pensions |
1.2 |
0.9 |
Defence |
2.7 |
3.5 |
Other |
10.9 |
10.6 |
Total |
39.8 |
48.6 |
The share of total government receipts (mainly taxes) in GDP stays constant between the two periods at 42.7% of GDP. (There are offsetting small changes in the GDP shares of particular taxes.) So inevitably the increase in spending means the deficit steadily increases in an unsustainable way. This is only as interesting as the reasons why certain items of public spending are rising as a share of GDP.
The most obvious story is the state pension, where the triple lock ensures that the state pension rises faster than GDP over time. If governments are unable to end the triple lock, they will have to cut other areas of spending substantially or raise taxes substantially. As far as I know no leading politician has addressed this, and few in the media ever question them on this.
More interesting is health and social care. That the share of total GDP going to health and care spending has risen substantially in the past and is likely to continue to do so is something I have emphasised whenever I get the chance, starting from when Osborne’s lied that he was ‘protecting’ health spending by keeping that share constant. (A lie once again accepted by most of our wonderful media.) But the report’s analysis of why this trend continues in the future is interesting.
If you think this is all about an ageing population, you are only a bit right. The population is certainly ageing in the report’s projections, and the UK population starts to fall beyond 2055 because of a low birth rate, but the OBR think that only accounts for around a fifth of the rising GDP share of spending on health. Far more important is low productivity in health services (compared to the economy as a whole) and the fact that as people get richer they want to spend a rising share of their income on health.
The size of neither of these two more important factors is set in stone. Trends in expenditure shares are likely to level off at some point. AI may improve at least some aspects of health service productivity, although face to face care is always going to be central. Where I am more optimistic is that additional spending on prevention may reduce the need for ultimately much more expensive spending on treatment, but the problem there is getting governments to devote resources to prevention.
It is also interesting what items of public spending are not causing problems. Welfare spending other than the state pension, for example, far from being ‘out of control’ remains pretty constant as a share of GDP. Nor do pensions in the public sector create a problem. A falling population generated by lower births leads to a marked fall in spending on education, offset by higher defence spending. (Who knows what defence spending will need to be in twenty, let alone fifty, years time.)
The report is very good in presenting various scenarios alongside the central projection. However I have one important quibble. They present two alternative projections for productivity, one better and one worse than their central projection. However in these exercises they hold public spending constant in real terms, so higher productivity and growth substantially reduces the extent of increasing deficits (because higher growth automatically raises tax receipts).
I think this is misleading, and goes against their default assumption about public spending. It also makes little economic sense. Public services are not inferior goods. So as people get richer, other things being equal, they want more public spending. As they note in Chart 5.5, if they assume more realistically that public spending will rise in line with better GDP growth then the fiscal benefits of higher productivity are much smaller. This quibble is important because there is a danger that politicians will think that better growth will solve longer term fiscal problems, when it will not. It is also why I say above that the assumptions made about long term growth are not critical to the main message of the report.
Although some of the assumptions about the triple lock and health spending may be too pessimistic, I doubt if all these pressures on public spending will disappear. Indeed some pressures may be neglected in the OBR’s analysis. The most obvious to me as I write from a part of the country that has seen no rain and very high temperatures for over a month is the need for climate change adaptation. In addition, as the Prime Minister has made clear, there is the need to provide some kind of state insurance for the costs of social care for the elderly. (This is good on what other countries do.) We have also not acted on the lessons from the pandemic, many of which require spending more money.
This leads to what for me is the main message of the report, which is that taxes are almost certain to continue rising over the longer term. It is a message that pretty well all politicians do not want to hear, and instead pretend the opposite with talk of tax cuts. As usual it is the Conservative party that is the main source of this problem, always talking about cutting taxes but refusing to consider reducing the scope of the state in areas which might dent its popularity (like the triple lock). Yes, you can cut tax by stripping the quality of public services to the bone, but Osborne did that and public services have yet to recover.
But ultimately we get the politicians our media tolerates. Journalists have become very zealous at asking Labour politicians how they will pay for any additional spending, but rather less adept at doing the same for promises of lower taxes. This report provides ideal ammunition for any journalist prepared to do this. But as I have noted many times, journalists have little incentive to bother politicians with facts or expert analysis.

