

A free market is one that is free of corruption and unfair business practices. Which cannot exist without regulations and the enforcement of those regulations.
We’ve had numerous laws precisely because companies couldn’t play fair, and made things worse for all involved. The government didn’t pass laws against company towns, scrip, and predatory pricing because they decided to ban things for fun.
Plus I can’t imagine that a company who is adulterating their milk with chalk dust is going to stop to find and choose a food-safe chalk dust and supplier. They’d just scoop a bunch from whoever’s cheapest, and if they adulterate their chalk dust with bleach or something, that’ll be going straight into the milk.