> All those arguments also apply to food production. But that's a free market, and does rather well.
I disagree; it does poorly:
Poor people in the U.S., the richest country in the history of the world, need subsidies (such as food stamps) to have enough to eat, and even then often can't afford healthy food. I read awhile ago that over 50% of children in U.S. public schools needed subsidized lunches (but my memory is hazy, so it might be that over 50% came from families that used food stamps or something similar; sorry I'm too lazy to look it up).
Despite there being enough food and money in the world to feed everyone, people still starve and others are malnourished in many places. At least some researchers attribute the Arab Spring to increased food prices, as a proxy indicator of the impact (again, too busy to look up the data).
> Yes, I know there are agricultural subsidies. It's not a perfect free market.
Agreed, and there are other distortions besides agricultural subsidies, esp. when it comes to international trade. I don't know enough about that market to characterize it.