Back up. You cite Japan as a strict immigration program (they have no caps, quotas and are actively recruiting foreigners and changing laws to make immigration more attractive), China (a totalitarian ethnostate actively placing a portion of the population in labor camps), South Africa (struggling with the fallout of apartheid) and Korea (I don’t know enough to comment) as your prime examples of tough immigration policy being ... what exactly? I don’t want Japan’s system for America, I want Canada’s - largely merit based, quick, efficient and open to anyone skilled, while still open to refugees and people in need. That’s how economies grow.

All of the these countries have universal healthcare and stronger better labor laws. I have spent a lot of time in Canada. They have generous social programs and Unions there are doing very well.

The United States puts American workers at a unique disadvantage to immigrants because there isn't much of a social safety net. It ends up a race to the bottom for cheaper disposable labor.