Comment by saghm

If a small group of people fully automated all production and controlled it, they wouldn't need anyone to buy anything anymore; they could live off of it indefinitely and produce whatever they needed to in order to protect themselves from the masses. I don't see any obvious reason why this outcome would be prevented by a purely capitalist economic system (assuming that this sort of automation ends up being possible), which in my mind is an argument in favor of some sort of upper bound for wealth consolidation.