[makeitdouble]

I agree with both you and the GP, and also see immigration as moving the hard problems from one field to another.

To solve the economic issue of maintaining growth, the US/EU moved to the issue of how to maintain a peaceful but diverse and divergent society.

I see Japan's partial bailing on immigration as a sign they don't see any good way to get through it, and we can see a lot of today's US internal fight as the result of not paying enough attention to how hard it is to adapt a society to the new challenges.

I wonder if there would be third ways, with economic powerhouse moving their "growth" to other countries without a stigma of stagnation or exploitation.