The modern American life is very strongly predicated on cheap, abundant supply of _some_ kinds of nutrition (unhealthy for most, but still, something that prevents starvation even if it increases the chances of heart disease etc.)
If is the key point here. We've never been anywhere close to a famine despite our farmers operating in an unprotected market.
Edit: Answered. Corn is used as a cattle feed and hence beef prices will be impacted. It will have a chain reaction pulling down just corn subsidies.
Tangent: India used to have famines and import grains until Punjab ushered a green revolution with record wheat and rice harvests in 1960s. My grandma told me how before wheat barley used to be the nutritional source, and I for nostalgia sake asked for a barley dish. Nearly threw up.
I like it as well, nevertheless.
2. Driving without a seatbelt, or car insurance works, until it doesn't.
3. You'd probably be producing even more food/person, and be more resilient to market failure/drought/crop failures/etc were it subsidized.
1. According to my googling, the USA has 0.38 hectares of arable land per person, NZ has 0.14 per person.
You're aware only 2% of our land is arable compared to the USA's 16% right? Lots of mountains and hill country here.