According to Wall Street Journal: Some critics question whether the Postal Service is charging the delivery services like FedEx, UPS and Amazon enough for the services. The flood of these packages has begun to tax the system.
FedEx and UPS are moving more of their packages through the U.S. Postal Service, putting pressure on the quasi-governmental … The U.S. Postal Service, having lost so much first-class mail business because of the Internet, is counting more on package-delivery contract work for UPS, FedEx and others.
For FedEx alone, the post office delivers an average of 2.2 million packages a day, or about 30% of the express-mail company’s total U.S. ground segment.
UPS won’t specify how much of its shipments go through the post office, but a regulatory filing indicates those type of lightweight shipments accounted for 40%—or about 37 million packages—of its total increase in ground shipments in 2012.
PMG Donahoe is quoted in the article as saying the criticism is unwarranted. “We make money on it. We wouldn’t do it if we didn’t make money on it..”
http://www.postal-reporter.com/blog/is-usps-charging-fedex-ups-enough-for-delivery-services/