Higher education can be a financial disaster. Especially with the return on degrees down and student loan sharks on the prowl. BY KATHY KRISTOF As steadily as ivy creeps up the walls of its well-groomed campuses, the education industrial complex has cultivated the image of college as a sure-fire path to a life of social and economic privilege. Joel Kellum says he's living proof that the claim is a lie. A 40-year-old Los Angeles resident, Kellum did everything he was supposed to do to get ahead in life. He worked hard as a high schooler, got into the University of...