When a prepared credit card system goes down, millions of unbanked American lose their ability to access funds needed to pay bills, buy groceries, and make other purchases. This scenario was illustrated last month when customers using Walmart-branded Green Dot prepaid debit cards said they had been stranded without their funds for several days, and in some cases weeks. Now, a pair of lawmakers wants to understand the debacle better and work to prevent something similar from happening again. [More]