Unfortunately, a lot of people (especially Michael Pollan) see this sort of thing, and they conclude that the best solution is to subsidize veggies.
This time, for sure!
Link thanks to andrewducker.
Addendum: I'm surprised that so much more of the subsidies go to meat and dairy than to grains, since most of what I hear about is corn subsidies.
The chart may not include that the price floor for sugar acts as an indirect subsidy for corn syrup.
The food pyramid just indicates that the government policies are inconsistent-- there's been a lot of disagreement about whether it's even close to optimal nutrition.