Earlier quoted context omitted.
You can only keep the prices high with cartelization or true scarcity. Though removing subsidies (for things like public transport) can also raise prices. But our food supply is highly distributed. If one vendor charges higher-prices, others will take the opportunity to offer lower prices as long as they still can get the margin. We often debate various forms of market failure on this forum, but in the cases of funct…
"But our food supply is highly distributed." Not nearly as much as it needs to be. Indiana imports 90% of its calories. What does it take to get vegetables grown near Indianapolis?
> our food supply is highly distributed.
I meant this in the sense of diversity if firms, not geographically. We've certainly seen consolidation with some of the bigger agri-conglomerates, and the trends are worrying, but we are nowhere near monopolization of the industry as a whole.
From Wikipedia:
> The 2012 US Census of Agriculture indicates that 5.06 percent of US farms are corporate farms. These include family corporations (4.51 percent) and non-family corporations (0.55 percent). Of the family farm corporations, 98 percent are small corporations, with 10 or fewer stockholders. Of the non-family farm corporations, 90 percent are small corporations, with 10 or fewer stockholders. Non-family corporate farms account for 1.36 percent of US farmland area. Family farms (including family corporate farms) account for 96.7 percent of US farms and 89 percent of US farmland area;[17] a USDA study estimated that family farms accounted for 85 percent of US gross farm income in 2011.
There are plenty of issues with our food supply system. But I don't think we need to worry about monopolies raising prices unilaterally. The OP thought we needed price controls to keep food costs low. I don't think this in the case. The problems are instead on the poverty side of the equation. Who has the money to pay for our (generally pretty cheap) food? The are too many that are food insecure, not because groceries are expensive, but because they are in poverty.