In state tuition for Mississippi State is $4,596. Out of state is $10,552. Where do you think that extra six grand comes from, the Tuition Fairy?
Yes, they get it back out of your taxes because a college graduate stands to make far more money over their lifetime than a non graduate.
The median household income in 2003 was $40,000 in the US, so there lots of people surviving on a hell of alot less than $100,000. $100,000 a year is still an awful lot of money that anyone who isn't retarded should live very comfortably on. Also, you can buy a new car for under $20,000 (hell there's a Kia that costs $7000 new) and no one is forcing you to buy a new car anyway. Houses are expensive, but no one really expects to pay off their house with one year's salary and the real estate market is ridiculously over inflated right now.
Also, I haven't looked into the housing market in Mississippi but I'm sure there are plenty of houses available for well under $150,000. You're not exactly living in Manahattan.

