They're just people doing a job that their boss made needlessly annoying. They shouldn't need to open a vault to get a couple hundred bucks.

Don't punish the workers, punish the boss

Oh my god FUCK OFF, KAREN. That first paragraph is entirely a product of a situation you - and you alone - imagined, based your own self-indulgent righteousness and prejudice. If the bank has bullshit processes, even the most egregious simpleton would see that by throwing a tantrum at the working class labourer who is as bound by them as you are, all you're doing is succeeding at making their life worse while utterly failing to address the systemic issue causing the problem. You want to write a letter to their boss, complaining that the worker was hesitant to address an unusual query, you UTTER FUCKING NARK? Get a sense of perspective. You soulless husk.