Sad to see the USPS getting worse and worse over the years. It has been a very successful least common communications denominator for over 200 years. It delivers all over the world and does a great job doing so. I would have been using them almost exclusively all along if they would have had a package tracking system like the other guys. USPS keeps rural areas connected to everything else. It is still amazing to me that I can be in such far off places as Hawaii, Guam, or Palau and for less than 50 cents send a letter or postcard to someone living at the bottom of the Grand Canyon or middle of Maine and almost never fail it gets there and quickly (3-5 days). This is definitely not the case in some other countries. Of course I know the Internet has changed things (been using Internet since 91), but still things such as legal contracts, business with governmental departments, shipping of precious metals, etc are still done largely via US Postal service because of its reliability and legal protections.
I think the USPS is a public good and an important part of keeping such a large country with spread out citizens on more equal level. Does this mean they need to find ways to be more efficient? Sure! Does this mean they need to compete with fully private companies? Sure! But I think we need them to stay around and be healthy. This means tax payer money needs to added in because some parts of the business will never be very profitable. Someone needs to deliver the things to people who do not live in high populated areas and the letters to Santa.