Combine a points-based migration system that welcomes higher-earning younger people with progressive tax systems and you get a result like this, from Tim Hughes at Treasury:
The central finding of this paper is the simplest. In aggregate, the foreign-born are becoming increasingly important for the country’s tax base. Foreign-born people made up 24% of the population in 2000, also paying 24% of individual tax on market income. Since then, the foreign-born’s share of the population has grown, and their share of tax paid has grown even faster. In the tax year ending March 2024, the foreign-born made up 32% of the population, and paid 38% of the tax.
As Lewis Holden put it on Twitter: 'Goddam immigrants coming to our country, paying all OUR taxes'.