In that case, I refer you to the spiffy US series ‘Designated Survivor’ ,starring Kiefer Sutherland. (I season)
He plays , a junior secretary, Wildlife I think. He is the ‘designated survivor’ while the whole Congress and Senate sit together. There is a bomb with massive explosion and they are all killed. Kiefer is now president.
There’s another series (one season) called ‘Commander In Chief’ with Geena Davis. She is vice prez, he dies she becomes prez (25th Amendment)-------
Anyway, purging the lot would make no long term difference. Generally speaking, it is my observation that politics seldom attracts the best and brightest. So most of 'em are easily replaced.
The proof of that pudding was seen with Donald Trump as prez together with the venal immorality or far too many elected republicans.
I have no illusions. There is no doubt in my mind that many Democrats would act the same way if the situation were reversed.
Yet another reason for my belief that Aussies tend to have a healthy contempt for professional politicians.