Like many middle-class families, Cortney Munna and her mother began the college selection process with a grim determination. They would do whatever they could to get Cortney into the best possible college, and they maintained a blind faith that the investment would be worth it. Today, however, Ms. Munna, a 26-year-old graduate of New York University, has nearly $100,000 in student loan debt from her four years in college, and affording the full monthly payments would be a struggle. For much of the time since her 2005 graduation, she’s been enrolled in night school, which allows her to defer loan payments. This is not a long-term solution, because the interest on the loans continues to pile up. So in an eerie echo of the mortgage crisis, tens of thousands of people like Ms. Munna are facing a reckoning. They and their families made borrowing decisions based more on emotion than reason, much as subprime borrowers assumed the value of their houses would always go up. Meanwhile, universities like N.Y.U. enrolled students without asking many questions about whether they could afford a $50,000 annual tuition bill. Then the colleges introduced the students to lenders who underwrote big loans […]