LOL. Yeah, that's it . . .
Harvard does have the largest (by far) endowment of any university in the country (probably the world). It also has a relatively small student population. The result? Harvard provides FULL financial aid to EVERY student admitted if they need it.
The rising cost of tuition has much more to do with fundamental shifts in ideology surrounding education in this country. First of all, colleges are being run more and more as businesses, where financial efficiency is the #1 priority. A large reason for this is that college degrees are now just a stamp of approval for someone who wants to enter the non-manual/service workforce. It's a commodity. The original purpose of the academy is eroding, which brings me to my next point.
The idea of the "academy" and universities being centers for knowledge and intellectualism has been forgotten/ignored. Why? because knowledge and intellectualism aren't valued anymore in this country. The right has launched an all-out assault on intellectualism (after all, college professors are predominantly liberal), which it sees as the perpetrators of socialism, atheism, anti-Americanism, and ever other -ism that gets them frothing at the mouth. Furthermore, young educated intellectuals (a great many of which make up the OWS movement) are viewed by conservatives as just a bunch of entitled, over-educated losers who don't know a thing about the "real world."
Mix all this together, and it becomes very easy to justify reduced funding, criticism of educators, and a view that education is not a universal human right, but a privilege that you must work hard at (often unrealistically) to earn.