The major problem with profitability or breaking even is the albatross Congress has placed around their neck regarding post-retirement health care costs 75 years into the future.
In 2006, Congress passed a law that imposed extraordinary costs on the U.S. Postal Service. The Postal Accountability and Enhancement Act (PAEA) required the USPS to create a $72 billion fund to pay for the cost of its post-retirement health care costs, 75 years into the future. This burden applies to no other federal agency or private corporation.