There is a presumption of corruption that pervades politics. And it’s critical for the process to work. We assume that every single politician is a lying, cheating piece of crap who will steal the country’s wealth at every opportunity. It’s a pretty valid argument and is a logical extension of the idea that power corrupts, and that ultimate power corrupts ultimately.
To handle the simple fact that every single politician should be considered corrupt, we have a checks and balance approach to government, where power is split between the executive, legislative and the judicial.
We demand that the executive and the judicial police the legislative and the executive and the legislative police the judicial and that the judicial and the legislative police the executive. It sounds dysfunctional (and it is) but it has proven itself to be the only system than curbs the human predeliction for self-serving power grabbing.
If the three parts of government fail to police each other then government fails. And the only recourse is to term limit every politician and automatically imprison every single politician at the end of their term for either the same amount of time they served in their political role or their entire life.
Government cannot function without aggressive and pervasive policing, we have no organization above the government (for example no king or queen) so we must demand that government continually look at every action of every arm with the desire to impeach any legal or ethical flaw.
If one arm of government fails to respond to any investigation, then they must automatically be disqualified from office. A government official that either fails to investigate or fails to respond to an investigation is just as guilty and must be removed from office.
The people demand nothing less.
The people don’t trust politicians, and thousands of years of human experience shows this to be reasonable response. A federal democracy with an imperfect electoral college based process, only works if we assume all politicians are going to cheat.