I haven't read all the pages so I hope I'm not repeating too much.
The post office is managed by someone other than the federal government.
I know mail offers and catalog senders are given a greatly reduced rate. Which results in lots of mail we don't want. Some catlogs come every three weeks with nothing new in them. There may be some saying all this junk mail has kept po going but it seems to me that it just takes more of the postman's time for less revenue. If we were just getting letters and bills they might be able to deliver faster. And as stated earlier it is probably wasting a lot of trees.
We had 24 hr. service at the facility at the airport and ours too now closes at 11 p.m. I would rather they close on a mid-week day such as Wed. or Thur. as it might get harder to get to one if they aren't open on Sat. :-(