“ But in my organization (military) it is normal for the more senior people to work those shifts.”

I remember reading a story about Jim Mattis (back before he was famous). A fellow general showed up, found Gen. Mattis was the duty officer on Christmas Day, and asked him how he got stuck with that.

Gen. Mattis told him, “Well, the young man who was scheduled for duty today has a family, and I decided it was more important for him to spend the time with them. So I took his place.”