Can the same be said of all the populations importing millions of foreigners to prop up "muh GDP"?
Absolutely. They’ll just go through a period of a bunch of social workers discovering a new corpse every three days. Whole towns dying because there is nobody to maintain the public services. The people will get exactly what they were asking for, and they’ll die for it.
I've yet to meet people immune from the inevitability of death, via the immigration policies of their country.
What exactly was your argument here? Because I'm not seeing the downside in what you wrote.
https://theonion.com/15-000-brown-people-dead-somewhere-1819...
Hopefully their population decline doesn't hit them too hard. But that, and their lack natural of resources, could lead to bad things. Fascists and their ilk thrive in such situations.
[0] https://en.wikipedia.org/wiki/Slavery_in_Japan#World_War_II