My college requires kids to have a meal plan if you live on campus. Ergo, if kids my age go elsewhere, they want the good stuff. The Outback down the hill from my school gets a lot of business from kids at my school on Friday nights. They also have what's called Flex Dollars that they can use at a few places around campus. Basically, that would be Subway, a pizza place, Qdoba, and maybe a few others. I couldn't even tell you where the nearest McDonald's around campus is. The kids at the college where I'll be taking Spanish is very much the same way (I can attest to this because a bunch of my friends go there).
I don't think it's so much that we have more money so much that it is that we don't want to eat carp. I bring stuff from home or I buy the good stuff. Kids who have apartment dorms or apartments do the same thing.