Something not mentioned: people who don't want babies, but are uncompensated for forgoing that choice. That has value they are not being compensated for.
https://www.mckinsey.com/mgi/our-research/dependency-and-dep...
https://www.cato.org/cato-journal/spring/summer-2018/demogra...
https://www.cato.org/cato-journal/spring/summer-2018/demogra...