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.
USPS has had an interesting track record with regard to what are called District Office operations. Sometimes they have hundreds of the things and other times dozens. You might well have caught them just as they were being abolished ~ I know that when that happens most people just stop doing whatever it was they had been doing.