There are no price controls in the food industry in fact government is helping establish corporate farms instead of letting the little guys compete.
Ever hear of Monsanto? They own the rights to Round Up ready corn and soy.
They are a very large corporation and they receive farm subsidies. If you don't know Round Up is a weed killer, the corn is genetically altered so that the weed killer won't kill the corn.
Most of the farm subsidies go to a small pool of corporations.