I read threads on here about (mostly government/civil service/adjacent) jobs with fixed payscales, like teachers, nurses, NHS admins, civil service etc.
I work in the private sector where you get paid depending on what you personally do in your role. (And yes, a bit based on what you personally asked your boss for in the negotiations, but at least it's marginally in your control.)
I just can't comprehend how people can deal with it. Just read a post about how Band Whatever senior teachers only get £10k more than juniors, why, "because that's the banding". So you either suck it up or quit, there's no "ask for a £10k pay rise" or however much would make it worth it to you?! This isn't how you get to market clearing rates!