I agree with your view in general, but there is a reason why the agricultural business is heavily, heavily subsidized. Largely for national food security reasons.
If that wasn't the case, I am not sure the US would be a competitive position to grow staples compared with much of the rest of the world, which in itself is a whole topic of discussion.
Given that it already is being subsidized, I think thought needs to be done for handling the topic of broad agricultural good distribution and subsidies. Frankly I think corn, bioethanol, meat etc... should lose their subsidies but that in itself would be quite a vote loser.
E.G. How about canals, barges, railways instead of roadways
Yes, national security is a good reason to subsidize food production. I might agree with keeping all those bridges open, on those grounds—though I suspect overall economic efficiency could be improved by removing some fraction of them, without harming rates of food production, and that there's effectively some level of unproductive free-riding going on.
I just object to framing things like urbanites must subsidize rural living because "that's where their food comes from". Sure, of course... but that's why there's a food market. We're not propitiating the farm-gods to shower food upon us, but, instead, paying for food. Subsidies might make sense for several other reasons, but, as someone who spend much of his childhood in the country and sometimes living on small farms, the defensive "but you owe us" attitudes from some people when this topic comes up seem downright bizarre.
I think it would be great if that subsidization came in the form a universal FoodStamps only spendable on nationally produced strategic goods.
This would make subsidization more transparent to the general public, while also enabling free-market competition and innovation rather than free-money stagnation.
I think a lot of people miss the entire point of food subsidies. Like you said, it is about food security. But that is a bit of an abstract concept to a lot of people, a better way to phrase and view it, food subsidies are an alternative to massive granaries storing 1-2 years of an entire nation's food supply. Since food yields naturally vary up to 30% either way, and natural disasters and bad weather can wipe out entire states worth of food, you either need to store all that food as a back up in granaries (which has its own problems), or we can guarantee an overproduction of food so that way if Iowa gets flattened by hail we don't end up with food shortages.
If that wasn't the case, I am not sure the US would be a competitive position to grow staples compared with much of the rest of the world, which in itself is a whole topic of discussion.
Given that it already is being subsidized, I think thought needs to be done for handling the topic of broad agricultural good distribution and subsidies. Frankly I think corn, bioethanol, meat etc... should lose their subsidies but that in itself would be quite a vote loser.
E.G. How about canals, barges, railways instead of roadways