As far as I remember Germany has 1/3rd of the population of the US – and a social democracy very similar to Denmark or Sweden. And Germany has large immigrant populations as well.
Could you explain why this concept can work with 80 million people in Germany, but not, say, the 40 million people living in California?
The US has a plenty of "safety-net socialism" as well, so I'm not sure of your point you are making about CA..a country that almost doubles its national debt ($12t to $20t) in only 8 years is surely doing its best to provide for its people, no?
For how many generations is that possible before the country bankrupts itself?
That’s not true.
The current influx of foreigners is about an order of magnitude smaller than the influx of foreigners from Turkey during the 70s.