Lance Armstrong was caught after a campaign by a few journalists- you don’t need to be able to make millions of dollars to be able to hold people to account and for people to call out cheating / fraud.
The financial markets will tell you that it’s different and they’re special. I don’t buy it, sorry. As we mature into the Information Age where I have access to more information on my smartphone than a Wall Street broker had 10/15 years ago this kind of behaviour belongs in the past.