And that taboo is probably rooted in evolutionary psychology, people have a genetically driven tendency to criticize those who advocate having less children? So could there be an instinctual drive behind it?
https://www.flashpack.com/solo/relationships/dont-want-kids-...
I guess people even have their pension funds tied up into the system, so nearly everyone is forced to participate in it, against their wishes even.
Update: Something to back that up: https://www.forbes.com/sites/jeffmcmahon/2019/04/05/the-worl...