It's a nice gesture from Harvard University.
As 5-0 Kempo pointed out, it's a private college, and if they wanted to charge 70 K / year for tuition, room, and board (don't blink; it's getting closer and closer as we speak), then that's their choice. There are plenty of people who are going to be more than willing (if not happy) to pay that amount, simply for the prestige of attending Harvard.
Even if someone can't afford the cost of Harvard, they can still get just as good of an education elsewhere, if they're willing to look. Some elitists may look down at state schools, but those schools can give just as good of an opportunity as an ivy league school, if a student works hard at his studies.
Looking back at history, tuition has been increasing rather disproportionately... When I was a freshman in college (private) back in 1989, a year of tuition, room, and board, cost $14,000 / year. These days, a year at that same college now costs in the upper 30's. I remember every year, getting that letter from the school, asking for donations from me, claiming that I had to put things in perspective, that the costs of everything were rising as well.
I'm not so sure about their comparisons, though... Back in 1988, my Nissan Sentra cost $7,500. These days, that Nissan Sentra costs about $15,000.