Guys responsible for making sure mailers give it up to the tune of a billion bucks a year are, of course, quiet and don't move around much!
Even quieter is the preparation of new procedures (regulations) to be followed to accept mail, enter mail, pay for mail, do this, do that, sign this, sign that, use forms in such and such a manner, and finally the quietest activity of all ~ designing a new form.
I did over 1,000 new forms over the course of several decades (that includes major revisions to existing forms as well as the creation of entirely new forms). ALL of my work made it easier for you to do business with the Postal Service, and some of them even saved USPS millions of dollars.
If you'd seen me working I'd been bent over my desk screwing around with a pencil (or later, a MacIntosh computer). Occasionally I'd twitch or something, or pass gas.
The people I saw at the district office were not doing anything except batting their gums and having coffee. I am not talking of worker bees, I am talking of honchos who were putting in time and to me not much more.
Maybe it was an anomoly but my personal experience with government staff work was the offices were over staffed and lost sight of what they were doing as in supporting operations. Having been one of those worker bees, not in the USPS, I know first hand about the amount of work that is done by them. Some of it unfortunately is process oriented work which adds no value except to bureaucrats. I lasted about 2 years doing such until I found meaningful work away from SOG. Perhaps I should not paint an entire picture based on a personal snapshot and I will leave it at that.