@YARNLADY I believe you are right. I know nothing about running the USPS, but I had a client who was a Postmaster in a fairly goodsized city and he told me, once when I complained about all the junk mail, that that was the only thing that kept the USPS alive.
There are now too many other competitors for first class mail. In my business, I use Fedex and UPS and email almost exclusively, all of which compete directly with USPS. I could use Priority Mail at USPS, but dealing with them is a pain in the butt.
I could not only do without Saturday mail delivery, I could do with one day a week delivery. I rarely get anything of importance in the mail.