In addition, (actual!) anti-corruption legislation has a massive potential to hurt right-wingers, because their politics is oriented toward defending/opposing particular groups of people (blind loyalty) rather than defending/opposing values (morality).

Right, which is why it can still be a good change, even if done my a corrupt party… Granted, if its done right or done at all. Like, in an ideal world, sure lets throw the bribery thing in there as well. But you know, lets be realistic and go one step at a time…