Servicing federal student loans would likely become more costly and cumbersome under a set of best practices recently issued by a White House-sponsored interagency panel. Back in March, the Obama administration assembled a group of officials from the Treasury Department, the Department of Education, the Office of Management and Budget, and the Domestic Policy Council to monitor trends in the government’s student loan portfolio, budget costs and borrower assistance efforts. As part of that effort, the task force was directed...