We can add the FCC to the list. They make a decent sized deposit to the Treasury each year. Though that mostly comes from the auction of wireless spectrum
The 70s legislation also changed the name to the United States Postal Service (USPS). Before that in was the United States Post Office (USPO).
Also:
3. Anytime the Post Office proposes closing down a barely-used PO in some tiny village, they are hit with a barrage of complaints from the residents .. and their Congressperson, and Senator. Other businesses can open & close offices at will, based on demand. Not the USPO.
Well, of course we’d expect them to be self-supporting.
I think it was Dennis Miller who said, “I have no complaints about the Postal Service. Ever try walking up to someone in Times Square and saying, ‘I’ll give you 45 cents to take this envelope to San Francisco for me’?”
If only the USPTO could strive to meet the speed and reliability of the USPS…