The state pension bill is heading from 5% of the economy to 9%. The number of workers paying it is heading the other way.

Two numbers published this month point in opposite directions and belong in the same sentence. The Office for Budget Responsibility, the government's own fiscal watchdog, set out its fifty-year sums a fortnight ago. On the current path, state pension spending rises from about 5% of the economy to around 9%, and health spending from 8% to 13%, as the country ages and the triple lock does its work. National debt, the OBR said plainly, is on an unsustainable, ever-upward path from around the 2040s. That is the bill. Now the other number: the birth rate. The number of children the average woman in England and Wales will have has fallen to 1.41, a record low for the third year running, and from around 2030 more people will die here each year than are born.

Put plainly, the bill is rising and the group that pays it is thinning. But the honest version is more interesting than the doom version, and it turns on a distinction the official forecasts make yet rarely join up. The population is not shrinking: it grew by around 706,000 in the year to mid-2024, entirely through migration. So this is not a story about too few people. It is a story about too few earners, of the right kind, in the right place, relative to a rising number of retired ones. The head count is filled. The wage packets, including yours, are the open question.

Regular readers will feel the echo. Ten days ago this paper looked at the other blade of the same problem: the OBR's own warning that if AI shifts income from wages, which are taxed heavily, to profits, which are not, the tax take thins even if the economy grows. We were careful then and will be again. That shift is a modelled risk, not a measured trend: the share of the economy paid out as wages has in fact held steady, at around 55%, since the mid-1980s, and the OBR says the net effect of AI on it is not clear. So set that blade aside as unproven. The demographic one is not unproven. It is arithmetic, and it is already under way.

For you, none of this is abstract. The state pension you are paying for through National Insurance is the single largest line in that rising bill, and the age at which you will collect it is legislated to climb: to 67 within a couple of years, then 68, then, in time, 69. The tax on your wage funds the gap in the meantime. None of that is a reason to do anything in particular today, and it is certainly not advice about your own pension. It is context. The system that will pay for your later life is being asked to stretch across fewer working-age shoulders, and yours is one of them.

This is the ground the new government's first economic programme, expected Thursday, will be built on. The answer trailed so far is a familiar and decent one: rebuild good jobs, revive industry, train people up. But every one of those good jobs is also a wage to be taxed and a worker to be found, and the sums underneath assume a supply of both that these two forces are quietly draining. When the programme lands, the question worth holding is not whether it promises jobs. It is whether it has noticed what is happening to the people meant to fill them.