Years ago I went into an electrical meter room for a very large apt complex to do some phone work
The floor had about a foot of bulk/junk mail on it.
It was loaded.
Carrier was throwing it in there vs delivering it to the individual boxes
I called the PO
Found out later carrier was canned
I’m not all that familiar with the Postal Inspector’s office but, gettin what I’ve seen, I’m guessing they’re apolitical. If you screw with the mail, they screw with you.