The only thing that is causing the problem is the federal government has demanded the USPS pay vast riches into a special tax on them alone which the government

The only thing that is causing the problem is the federal government has demanded the USPS pay vast riches into a special tax on them alone which the government is calling a "trust fund" for "future pension obligations". This is just a ransacking of the postal service's operating income by the feds. There is no trust fund, the money is not saved anywhere. It goes into the Treasury and is spent by the federal government the same year it is received. 100% of the postal service's financial problems are because of this plunder.