Letting in immigrants while you are trying to reduce working hours is a good idea because a) moral b) you are trying to show off you have the best society, let people vote with their feat c) you still need to make investments so being able to have total working hours go up while per-capita working hours goes down is good. Especially if there is a tech/productivity lag where you don't get fully automated dank shit for a few years after you make labor scarce
Letting in immigrants as beneath-the-table workers while trying to lower working hours means you get apartheid not utopia, so yeah, it's bad. The thing that makes America less bad is at least the elite likes to overwork itself for cultural reasons so the rat race is just as stupid but less unfair than it would otherwise be.
The best-of-both-worlds is what I want. The first decently country to let in immigrants while reducing working hours is going to crush everyone else with a strong, more technologically- and culturally-advanced society. I am excited to see it happen.
(incidentally a very vague materialist take on why the soviet union sucked is it began too underdeveloped, and in the rush to do more work they ended up too military-industrial. A lot of people say "not enough consumption" but you ought to connect it being able to let demand "pull" investment rather than centrally "push" investment. More consumer goods or less working hours are somewhat equivalent once you are (post-)industrialized.)
https://www.unhcr.org/refugee-statistics/
Edit: Btw, I think the poster above meant the millions of undocumented immigrants living in USA without full rights.
The US has admitted more than 1.2 million refugees (I believe the number is closer to 3 million), this chart only counts refugees under UNHCR mandate.
"Syrians good, Greeks bad, let's breed Neo-Nazis with austerity so Syrians bad soon too. Oh and more coal." Is that really net good?!
The best case --- if it works --- is "non-reformist reform" as the European social democracies were planning. Some Marxists think it was doomed to fail because you can't avoid the antagonisms. I think they were merely prudish about printing money (especially Germans), and if drank more Post-Keynsian kool-aid (and let in more immigrants not as an underclass like in America), we would all be Socialist already.