> The problem is not their refusal to accept foreigners but rather they are not fixing the real problem (low birth rates).

How can you fix low birth rates once the process is in decline? Are there any successful examples of a country that has gotten rich, or is getting rich, that has done it succesfully? Every example I've read says no, regardless of geography or culture. It seems an impossible problem to fix.

In South Korea for example, I've read they've tried a veriety of incentives, and none work. The pressure to climb into or stay in the middle class, squeezes families or would-be mothers to work more, leading inevitably to lower birth rates as wages have stagnated over the past few decades (oversimplyifing but this applies everywhere).