American students pledge future salary to avoid debt

American college students are turning to a new strategy to avoid the debt trap that has captured millions, pledging a share of their future earnings to pay for their education rather than borrowing.It is thanks to an ISA that Paul Laurora will graduate on May 11 from Purdue University, Indiana as a chemical engineer.Despite state-subsidized loans, his own savings, and a contribution from his parents, the 22-year-old ran out of money after only two years of studies, with tuition and fees costing