I think you’re missing the point. Modern societies with things like welfare, free healthcare, the concept of “retirement”, etc. require a growing population in

I think you’re missing the point. Modern societies with things like welfare, free healthcare, the concept of “retirement”, etc. require a growing population in order to function. But if the natives aren’t reproducing, either the natives have to accept a lower standard of living (ha ha) or you need to import warm bodies to keep the game going. We’re assured, of course, that importing anyone and everyone has absolutely no negative effects, but, well, we’ll see.