Credible whistleblowers have additional incentive, and it would serve as a good yardstick for just how much folks detest a given official.
Alternatively we could take the crypto and go full Weimar Republic with a Kickstriker[0] clone for politicians!
[0] - http://kickstriker.com/
Hard to protect leakers, victims and funders when the perpetrators have the power to trace payments and seize assets.
Alternatively, we can create an easy-to-use site for the common man who is willing to pony up some petty cash for whatever their version of "justice" is. At sufficiently high levels, in sufficiently corrupt societies they can trace things down and disappear you. This idea isn't for those places, and likely wouldn't even work anyway.
However, in nations with reasonably sound rule of law this could potentially work.
People already know who is corrupt, who is sexually harassing, etc.
Certainly their victims and co-conspirators know it. Probably their staffers, friends and family have a pretty good idea.
Often reporters themselves know who is dirty but don't have enough corroborating sources to get past the fact checkers.
So it seems like the Wikileaks model could be improved with a crypto market. Those in the know place bets on who is dirty and get a payoff when the dirt eventually gets disclosed.
It would be a nice incentive to get more disclosure, and it would directly reward the victims and leakers.