Sounds crazy, but with a bit of accounting help from Congress, the U.S. Postal Service could go from pauper to prosperous faster than an Express Mail package. Even though the Postal Service is $13 billion in debt, has stopped making certain payments into the federal retirement system, and is projected to become insolvent and lose another $8 billion this year, it could happen. Because over the last 40 years, USPS has overpaid between $50 and $70 billion into the U.S. Treasury, or so says the agency and its independent regulators. Several bills are pending in Congress that could release these funds to the agency. Read on for the details.