It's not just for food. First, we're tacking on fees to stay at the resorts. Then, we're adding extra hours to HS and MK so that people can actually try to ride the popular attractions, but that's not included with the price of admission. Speaking of admission, you could now pay more for your tickets depending on what "season" you go in. But this is a tangent for another thread perhaps.
Food, focus on food. I totally agree. I don't think it's fair that people who are going during the later half of the festival have to pay more for the same portions that were offered at the beginning. I mean, they've already run out of some of the decorative glasses so now people are going to have to pay a higher price for plastic cups that get tossed in the trash. Many guests have set budgets that are already stretched thin. A dollar here or a dollar there may not seem like much, but it adds up. If they wanted to increase the prices for next year, fine, but changing it in the middle of the event seems unfair. Of course, Disney doesn't really care what I think so the point is moot.