The USPS is highly over staffed for the workload. The main reason it is so inneffective is Government rules that remained even when it was privitized and an out of control Government Union that protects eliminating unnecesary jobs. I have dealt with Post Offices all over the country mailing millions of packages. I have seen Post Masters that think they are god. Untrained employees that insist on doing things in a way the USPS actual doesn't allow. Refusal to listen when you give them the actual facts and where they can find it in the DMM. And an overall preference to saying no to a customer instead of working with the customer.