Can rich countries sustain public services and taxes without immigration?
Core argument: Across the rich world, longer lifespans and falling birth rates are pushing care-dependency ratios—the number of workers supporting the young, old and sick—below the level needed to sustain the public services and tax levels electorates expect.
Across the rich world, almost every state faces a version of the same problem: their people are living longer and having fewer children. Every year, tens of thousands of citizens will hit state pension age or retire, and fewer of us are having enough children to maintain our care-dependency ratio (the number of working people supporting those who are too young, too old or too sick to work themselves) at a point that provides the standard of public services and the levels of tax that modern electorates have grown accustomed to. But politicians have a problem: immigration is the subject of fierce political opposition. Democracies risk falling into a doom loop, in which restrictions on immigration mean ever greater demands on the purse of the native-born population and ever worse services, which in turn deepens opposition towards immigration and therefore creates yet greater pressures, and so on.

