I am trying to picture this situation in my head and just can't picture it. Is the OP saying 1SG's, CO's et al are pulling a shift every now and then or are pulling regular shifts on guard duty? There is a difference. Now, I did not have to deal with "troops" since I was a SSG because I went SF and all you had were NCO's. But being in CZ's I did see Platton Sergeants, 1SG's, Officers pull gaurd duty. Not as the norm but if there was a unique circumstance. I did it during Desert Storm before I went SF as a Platoon Sergeant. PFC Smith was suppose to be on guard duty while CPL Jone was suppose to fly but was sick and the only person avialable with enough crew rest was PFC Smith. So PFC Smith flew the mission, CPL Jones was sick puking his guts out, so I filled in half the shift until the manning was sufficient to have someone do the rest.
I can not fathom an Army unit where it is the norm for the 1SG and CO to pull guard duty. In fact, I would classify it as dysfunctional and poor leadership.
Here is a more mundane example: Platoon is short of soldiers and they have motor pool day. The Platoon Sergeants vehicle's assigned driver is not there as well as many other soldiers. The Platoon Sergeant should be doing the weekly PMCS and not assigning it to another soldier. If the Platoon Sergeant has no pressing business then he can assist newer soldiers and their team leaders in PMCSing thier vehicles. It is a good way of getting the work done, ensuring that the troops see you getting your hands dirty, and also check on how well your team leaders are performing in teaching basic skills to the newer soldiers. Good face time with the troops also.,