Not capitalism exclusive, but expected in any system that has strict hierarchy and needs lots of bodies in the lower levels - capitalism needs truckloads of poor people just like petty aristocrats needs serfs. The moment the population of those lower levels start to diminish, they call out for everyone to have more kids.
Maybe if the whole world became equally stratified, at this point is makes far more sense to import workers at the start of their working lives who have already been taught to read and write. Simply provide high enough living standards to compensate for the loss of friends and family and you can get a healthy individual where the capital has already been spent and put them to work
Not capitalism exclusive, but expected in any system that has strict hierarchy and needs lots of bodies in the lower levels - capitalism needs truckloads of poor people just like petty aristocrats needs serfs. The moment the population of those lower levels start to diminish, they call out for everyone to have more kids.
Maybe if the whole world became equally stratified, at this point is makes far more sense to import workers at the start of their working lives who have already been taught to read and write. Simply provide high enough living standards to compensate for the loss of friends and family and you can get a healthy individual where the capital has already been spent and put them to work