How exactly will that happen? Most Western governments are happy to import immigrants after their own populace wakes up to their bullshit and stops tolerating it. Many immigrants don't mind working for 20% of what a local would work.
I don't see us running out of Indians, Chinese and Africans in the next 200 or so years at least.
I don't see us running out of Indians, Chinese and Africans in the next 200 or so years at least.