In reality, the “free market” is a bunch of rules about (1) what can be owned and traded (the genome? slaves? nuclear materials? babies? votes?); (2) on what terms (equal access to the internet? the right to organize unions? corporate monopolies? the length of patent protections? ); (3) under what conditions (poisonous drugs? unsafe foods? deceptive Ponzi schemes? uninsured derivatives? dangerous workplaces?) (4) what’s private and what’s public (police? roads? clean air and clean water? healthcare? good schools? parks and playgrounds?); (5) how to pay for what (taxes, user fees, individual pricing?).
And so on.