> Markets rather optimize for the most efficient usage of resources.
Most efficient usage of resources in what sense?
Most efficient usage of resources in what sense?
If a company is able to pay more for their commodities, it means that it is able to create more of an economic value of the commodities than a competitor (otherwise it would not be able to pay this price). This leads to a more efficient and effective use of the commodities that are traded on the market.
Indeed, if slavery turned out to be more efficient, it would.
But I think that the claim that slavery is more efficient does not hold, since opressing people binds a lot of ressources; also opressed people tend to do work as minimally as possible.
So it is much more efficient to give people the illusion of freedom instead of enslaving them.