The Fall of the Ageing Argument for Mass Immigration

The ageing crisis was always the growth lobby's favourite scare story. For years the argument ran like this: the population is getting older, the ratio of workers to retirees is collapsing, and without a constant inflow of younger migrants the budget will buckle under pensions and health costs. High immigration was therefore sold as the responsible, compassionate solution. Keep the population young. Keep the labour force growing. Keep the economy expanding.

That argument has failed. Age dependency has risen, as expected. The share of people over 65 is higher. Yet the economic dependency ratio, the actual proportion of people not working relative to those who are, has been falling. Australians are living longer and healthier lives, and they are working later. Participation rates among those in their sixties have roughly doubled. Among those over 65 they have tripled. Young people stay in education longer. The rigid age brackets used in the crisis narrative no longer describe how people actually behave. The sky has not fallen. Living standards have not collapsed under a wave of dependants. What has happened is the successful stretching of working life.

Once the crisis is shown to be overstated, the main public justification for high migration begins to look thin. Immigration does not permanently rejuvenate a population. Migrants arrive younger on average and temporarily improve the worker-to-retiree ratio. Then they age at the same rate as everyone else. The bulge simply moves forward. In twenty or thirty years those same people add to the elderly population, requiring yet another larger intake to keep the ratio stable. This is classic Ponzi demography: each temporary fix creates a bigger future problem while the absolute size of the population, and the infrastructure and housing costs that come with it, keep rising.

The growth lobby's deeper interest was never really about ageing. It was about perpetual population growth itself. An expanding population inflates GDP, supports property prices, fills university places, and provides a larger pool of low-wage labour. Ageing supplied a respectable public-interest cover for a model that benefits particular sectors while socialising the costs, congested cities, strained services, diluted capital per worker, and weak productivity growth per person.

If people are already working longer and the economic dependency ratio is improving, the case for using immigration as a demographic lever weakens further. The real questions become different: how to raise productivity so fewer workers can support higher living standards; how to design pensions and health systems for longer lives rather than 1960s retirement norms; how to support higher fertility without pretending that importing people is a substitute for it. These are harder problems. They require institutional reform rather than the easy arithmetic of annual migration targets.

The ageing argument has not survived contact with the data. Once that is admitted, the growth lobby's broader case for mass immigration loses its most persuasive public justification. What remains is a preference for a larger economy over a more productive one, and a larger population over a more sustainable one. That preference can still be argued. It can no longer hide behind a crisis that has not, and will not, materialise in the form claimed.

https://www.macrobusiness.com.au/2026/08/the-ageing-crisis-has-not-and-will-not-happen/