I think it's important also to look at the way in which tuition fees also affect quality. The quality of education someone receives when they're forced to work 25 hours a week in a part-time job, or work two jobs over the course of a summer, or delay graduate or professional school, is considerably of lower quality than if they're able to devote themselves full time to their studies.
One thing we're seeing is that in addition to the fact that the quality of education--in the sense of how universities are capable of paying teachers, and providing research and providing infrastructure--has decreased due to the drop in federal funding, we actually haven't seen an increase in the quality of education with increased tuition fees. Part of it is because students are also incapable of fully devoting themselves to their studies. So I think when we talk about quality of education, we also have to talk about the quality of education individuals are receiving because of the time and energy they can devote to their studies.