I agree about immigration, but the world has a large amount of very fertile land in places with very high costs of living. Bringing in large numbers of new immigrants at ultra low pay will have big consequences in most high-cost countries. It's worked well in the US, but that's because of our (former) identity as a nation of immigrants and the massive overlap between US and Latin American culture. In other nations, the outcome could very well be a racially/culturally incompatible underclass working the lowest paying and least consistent jobs, with little-to-no chance of fully integrating.

I can understand culturally incompatible, but what on earth is "racially incompatible"?

> working the lowest paying and least consistent jobs, with little-to-no chance of fully integrating.

It depends who the immigrants are. If your immigration laws favour highly skilled immigrants that is not going to happen.

In the UK people who live in ethnically mixed areas tend to integrate. In fact, I think most people integrate but the minority who do not are just more noticeable and used politically (not by just one side either).

Some of this is showing in a lot of places already. Cultural adoption as part of migration is important and you can only bring in so many migrants while maintaining anything resembling a national identity. Not to mention secondary effects of bringing a literal under-class of migrant workers into a society already facing the aftermath of heavy inflation combined with wage stagnation.

but Japan is actually relaxing immigration rules due to the need for younger workers. I bet they can pay them pretty well for less than the R&D, maintenance, and loss of productivity of the robots costs