It is a fast track to corruption without a strong independent judiciary yes.
politicians have a dual role they are the legislative authority and also are the executive (when in power) . They don’t do those roles concurrently but the same people switch between those two.
The actual execution happens by police lawyers or tax authorities as you say, but the direction and leadership is set by the politicians. When to prosecute, whom to and what punishment to ask for and so on.
In the US system there is additional complexity as what are nominally administrative positions like judge, sheriff etc also elected. So by definition those people also have to be politicians.
politicians have a dual role they are the legislative authority and also are the executive (when in power) . They don’t do those roles concurrently but the same people switch between those two.
The actual execution happens by police lawyers or tax authorities as you say, but the direction and leadership is set by the politicians. When to prosecute, whom to and what punishment to ask for and so on.
In the US system there is additional complexity as what are nominally administrative positions like judge, sheriff etc also elected. So by definition those people also have to be politicians.