The ones who managed to steal money via corruption will find a way to do so even if there is a cryptocurrency revolution. And those leaders are usually fond of very centralized systems, so maybe the decentralized nature of crypto is what might make them suspicious.
That's for sure. Politicians are not afraid of cryptocurrency due to the fact that it can defeat corruption. Unclean politicians may well use the anonymity of cryptocurrency for their dirty business. The reason for the reluctance to implement cryptocurrency is precisely that they are afraid of losing their power due to the fact that the cryptocurrency allows you to relatively uncontrollably move any amount of money, and money always means power.