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by 0xcafefood 1071 days ago
Right. And in fact, immigration doesn't solve the issue for a very basic reason.

A system that says "The number of working-age people must be at least 5x the number of retirees" is literally demanding unending (super)exponential growth. It's fundamentally impossible on a finite world. It's going to break down at some point. The only question is whether that happens before or after filling the developed world up with immigrants from the undeveloped world.