Clearly Maduro is no angel. Clearly he is a unpopular dictator.
But also he gets right, that when stopping drug trafficing was a priority, every investigator would follow the money and confiscate it. No drug trafficker or assassin is working because it is fun. They will start working in other sections or at least fail to hire new generations, as fast as the organizations go out of money.
So when a government wants to do something more than a puppet show, to make their personal gains behind their back, they would start their activities where the money is sitting at.
But this is not happening until the pressure of the public is so high, politicians can not do anything else than request the needed information from the financial institutions.