These were a staple of 70s comedies in particular. Usually skivers, over paid and of course above their station.
Miriam Karlin in the Rag Trade was a noticeable example and Arthur English in Are You Being Served who would flash his wad at the snooty shop assistants.
But I'm trying to recall which sit-com featured a shop steward from Lockjaw- Lift Operators, Caretakers, Janitors and allied workers?