I would argue that in preindustrial times the rich and the poor were on different sides of a subsistence level income. This was a huge distinction until recent

I would argue that in preindustrial times the rich and the poor were on different sides of a subsistence level income. This was a huge distinction until recently, but in the present day Warren Buffet doesn't have a harem, nor does he have several hundred children. Wealth and progeny don't scale.