That's because the premise is wrong > an economic system predicated on individual autonomy and naked self-interest whose incentives run counter to child-rearin

That's because the premise is wrong > an economic system predicated on individual autonomy and naked self-interest whose incentives run counter to child-rearing A free market is just the natural state of things which reflects what people want vs the reality of resource constraints. For example, even in communist societies there will always be a (underground) free market.