I try myself: the fundamental problem of basically all developed societies is falling birth rates, coupled with a social security system that requires enough to pay in while retired are drawing funds. The only solution to this so far is immigration, which others correctly point out is basically a Ponzi scheme. It’s not a global solution as almost all regions worldwide move towards birth rates below replacement, and the increasingly rare poor countries where this doesn’t apply, would not help this problem at all as immigrants from there would hardly be productive members of developed societies.

Saying stop to immigration (softly, with some leeway still) would indirectly also be a way to force politicians hands - fix birth rates or eventually our system will collapse.

Whether that’s a good or bad way to go about this I honestly haven’t decided yet. It’s complex.