What you wrote above is what I've heard from several relatives who were/have been postal workers for many years. They might not have a problem with privatization, but they have pointed to the Constitution. Many years ago, a post office job was considered a good job. But, nowadays, they mostly deliver packages because the USPS is competing with Amazon, UPS, FedEx. To say the mail carriers are not happy now would be an understatement. Instead of delivering letters, they're mostly delivering big, heavy boxes, and the letter delivery falls behind. They are overworked. Nevertheless, the older ones stay committed to the job. They always say they're hanging in there for the pension, but often they put off retirement. It's like they belong to a brotherhood they don't want to leave. They see their job as important and take their duties seriously. Actually, Clifford from Cheers wasn't far off. (lol) In fact, that actor was used in USPS training videos. I've never watched the Costner movie. I should check it out.
I really enjoyed the guys I worked with.
I had done factory work and hospital cleaning work before, and letter carriers (not the night mail clerks!) were a blue collar elite.
People joke about it all the time but handling huge sums of money, vital documents and registered/insured mail is a lot of responsibility and doing it well was (and should be) a source of pride in a way that humping Bezos’s crap around is not.