You should have described this lot as "who people put their trust in" and strangely enough it is nigh on impossible for them to be dismissed -
Teachers are never fired unless caught sex offending with the kids
Social workers are given words of advice and moved to other jobs
Police are retired early with full pension on sickness grounds & often re-engaged in "civilian positions". I had dealings once with a dodgy copper who became head of Scientific Support for his force
I agree with what you say about politicians - one strike and you're out