1. I think its interesting/notable that the colleges that are most successful at helping poorer kids, are not elite schools, but rather are training people for well paying "middle class" jobs like teaching them how to be an air traffic controller
2. nowhere does it talk about the cost of providing an education...if it costs College X $75,000/year/student and College Y costs $15,000/year/student then making Y "affordable" is eminently easier than X...the point being some schools may want to have a more economically diverse student body, but in order to achieve that end, they would need to either spend less on education (and consequently become less prestigious), raise more money/get more grants, or charge the students that are already paying full tuition even more...none of which appealing/easy...