Georg Jensen tears into the USPS in The American Interest Online. He builds the case that the USPS is running as a spam-mail distribution company, and is subsidized by first-class letter mail.
"When you tax something, you get less of it, and when you subsidize something, you get more of it. That is part of the reason the USPS now handles less first-class mail, because it is in effect taxed, and more junk mail, because it is subsidized."
Now that business is bad, the USPS is going to do the same as General Motors, ask the government for a bailout.
How different is Canada Post's business model?