More Subsidies?

One of Amber's recommendations for battling obesity:

Unless we convert Congress to a unicameral legislature, we're not going to get rid of corn subsidies and sugar price supports anytime soon, and the market will remain distorted in a way that promotes obesity. So as long as we're going to be distorting this market, let's distort it in a way that promotes healthy eating: add subsidies for farmers' markets, fruits, vegetables, etc. 

One of his readers asks:

[T]he stance on food subsidies is a little puzzling. The idea is that it’s easier to have more subsidies for healthy foods rather than cease existing subsidies. But aren’t other items in the list of 10 just as hard if not harder than ending the subsidies? If so, why give up so quickly?