This sounds plausible, but wouldn't work. The USPS has a history of defending its monopoly. Two example: In 1971 a private corporation, the Independent Postal

This sounds plausible, but wouldn't work. The USPS has a history of defending its monopoly. Two example: In 1971 a private corporation, the Independent Postal System of America, offered to deliver Christmas cards for five cents each — three cents less than the U.S.P.S. rate. They were stopped by a court injunction. In 1966 the CF&I Steel Corporation, frustrated by the quality of postal service between their Denver headquarters and their plant in Pueblo, hired an armored-car service to deliver the mail. After five months of operation the service was halted by the Denver Post Office, and "at the Post Office’s suggestion" CF&I paid two thousand dollars toward back postage..