This wasn’t “shady,” this was essentially a sting operation where they eventually seized 90 million dollars in cash and arrested over 100 people. Not bad. The bigger result was that it poisoned trust of banks by there kinds of criminals.
Professionals already have banks for that. 90 million dollars? These are small fishes.
They only helped the bigger ones go get rid of the competition and the effect on drug trafficking is near zero.
From another perspective, consider it probably did not cost $90 million to execute this plan. So overall, this is a net profit, and most likely cost effective.