Before the USPS was treated as the civil service, with unfounded liabilities being paid out of current taxation, like social security. Now they want the USPS to

Before the USPS was treated as the civil service, with unfounded liabilities being paid out of current taxation, like social security. Now they want the USPS to act like a private company and fund its own liabilities. If you change the rules you should not expect an organisation that was fine under the old rules to be fine under the new ones, especially immediately.