OP's comment isn't directly exclusive with stopping subsidies, though. I could agree with not subsidising corn but not having to regulate a fairly harmless product.

I think government should be a strong regulator in terms of breaking up monopolies. I also agree that the subsidies impact the free market. It's a bit of a complicated subject because price of food being volatile has often led to revolutions in the past.

So governments have a lot of incentive to subsidize food staples like corn or dairy. Without the subsidies we may see a sharp increase in inflation, at least temporarily. And whichever administration carries this out is virtually guaranteed to lose the next election.

Perhaps a better solution is instead of subsidies, we have a sort of basic command economy for staples while still allowing a private market for luxury food items. Not sure. Haven't thought about this much.

I don't like subsidies because groups that get fat off government's teat end up buying up our politicians and we start looking more like China where private & state power become intertwined. But maybe it's a necessary evil when it comes to food, I'm not sure.

A good example is Crisco, a 100% transfat cooking oil that corporations pushed for decades.