Uh what? Just so they can and will increase the cost of food because of food stamps.
Check it out:

When “Big Food” and “Big Food Police” congratulate each other for coming together with the White House, as they did when new food nutrition labels were unveiled last week, consumers and small businesses should be very nervous.

But the controversial new labels are small potatoes compared to what the Obama administration is now cooking up. At a closed-door meeting Friday, administration officials and their advisers will plot to insert the global warming agenda into dietary guidelines mandated by Congress.

The Agriculture and Health and Human Services departments are updating the guidelines for publication next year.

By favoring foods activists think have a smaller carbon footprint, the new guidelines will increase the prices you pay for what you eat. It will also increase the cost to all taxpayers, since the dietary guidelines are used to set policy for food stamps and military diets. […]