Don't see why that follow. Wealth is power, and wealthy people tend to be the biggest and greediest troublemakers. Wouldn't want them to have more power.
Now we're talking corruption. That's a different kettle of fish. What's a parallel scenario we could apply the same principles too? How about blacks and crime. You want to attack the problem of corruption by attacking an entire class of people in which some use their wealth to corrupt public officials and thereby harm society. Some blacks commit crime and thereby harm society, so what would you propose be done about ALL blacks in order to reduce crime in society.
I'm curious to see how this group-based punishment idea works.