For many Americans, student loans are a necessary evil. The average incoming college freshman understands little of the long-term impact of repayment plans. With millions defaulting on their loans, there's no doubt about it: the federal student loan program is a bubble-it's just that no one knows when it will burst. But when it does, it could be a disaster akin to the 2008 real estate crash. In this series of revelatory essays, author and professor...