The childless have more time to devote to their careers, and so outcompete parents in the job market. It's unfair. And here's how to rectify it: tax 100% of the estates of the childless after they die, and other ideas: https://medium.com/non-violence/stakeholder-control-compensating-parents-for-their-sacrifices-to-prevent-extinction-of-258bd3d8f3aa