Politicians, whatever the side, think to begin they are above all laws, and everything should be allowed to them. They don't like when somebody dares to say the opposite. They see them as some feudal lord having all rights on the serfs, only the richest bourgeois may be heard, because money.
Separation of powers may be a basis of democracy, but cryonism and corruption make it too many times an illusion. Our democracies are too often in reality oligarchies .