It used to be understood, before we started rewarding lawbreakers with goodies like birthplace citizenship, that punishing bad guys was the most effective way to stop bad actions. The best way to drop the murder rate, for example, is to swiftly and justly execute murderers.
For the same reason, the best way to end the political weaponization of the bureaucracy is to punish the weaponizers. As long as the architects of the most infamous abuses — from the Russia collusion hoax to the Biden DOJ effort to throw its political opposition in prison — escape accountability, new partisans will be emboldened to abuse their prosecutorial power for political ends.