Hear me out... If one in every ten woman have 3 children, and chop their eldest son to spread among the other nine woman. We can reach perfect equilibrium.
Tear humanity from nature and overwork them in factories and stale white boxes like cattle to the point every single person, even children is socially inept, mentally ill, and suffers from chronic stress, anxiety and Zoochosis for profit.
"Why can't people just pop more children! Ow my economy! Ow! Ow!"