Assassinating the most corrupt officials on a regular basis could have similar influence. They'd know they could pull schemes for money but would die past a certain point of damage to the people or elimination of their end of constitution. It works similarly.

It would just be harder as they'd have (a) lots more security, (b) most police going after whoever killed them while simultaneously ignoring whatever the politicians were doing, and (c) media protecting them since corruption works to media owners' benefit as well.