Some regulation is necessary to even define a free market. If you believe current US (at least for most of the population) law theory, all employment relations

Some regulation is necessary to even define a free market. If you believe current US (at least for most of the population) law theory, all employment relationships are completely at-will. They may be terminated at any time for any reason. I would argue that is all that is required for a free market. This would seem to contradict the claim that most companies to not internally operate as a market. I know there exist serious breaches of this freedom (ie. slavery), but it is not supposed to be the norm anymore.