If milk was $10 USD, it would encourage people to eat in ways that are cheaper to produce. Cheaper to produce unsubsidized lines up reasonably well with good for the environment (more vegetarian and vegan foods). I'm always surprised that milk is cheaper than canned beans on a calories per dollar basis, given the cows, pasteurization, and refrigeration needed.
This is correct. Additionally, many of the subsidies for agricultural businesses go to the largest player. That's why your local diary farm's milk is $8+/gallon versus the grocery store.
