Usps is the best government agency ever created. If it were a private enterprise it would be considered the most poorly run of all time.
5 days for priority mail for most of the country now. Used to be 2 days nearly everywhere in the US. Now they don't even take packages to the distribution center on the same day you drop them off. Its a joke, and a costly one. Mismanagement is very costly. That being said its not entirely the fault of usps that the costs are going up. When a country has a private central bank that issues debt that is considered 'money', you will have problems. You can't devalue the currency 99.999999% over the course of 100 years and keep prices down. Print more money, get more inflation. Simple economics, not so good for normal people, very good for large banks and corporations that get trillions in free $.