"In 1981, most students could earn two-thirds of the cost of a year of college by working full time at a minimum-wage job during the summer. Today, students would have to work full time for an entire year to cover the cost of one year at a public university..."
An interesting article from the Columbia Missourian, A penny saved is a degree earned.
I'd have to say that I definately missed out on a lot of stuff offered by my university because I had to work to get through college. Each year for the 4 years I was in school the tuition was raised, I think by 14% one year from the year before.