HoustonChronicle.com -- http://www.HoustonChronicle.com | Section: Business Jan. 28, 2003, 8:51AM Loan debt, burden hit worse now Student liabilities triple over decade By GREG WINTER New York Times Every so often, when the phones grow quiet and the copiers still, Margot E. Miles glances at the lawyers devouring cases around her and thinks: "I could do that. I would love to do that." A smile overtakes her as she envisions life as a lawyer -- fighting injustice, changing the world -- until the prickly reminder of having $25,000 in undergraduate loans wipes it away. Dreams can wait. As for the need to...