I'm not talking about just criminal negligence, I'm taking about honest mistakes too. If you want to be ultra rich, more than 20 million, then you have to be competent enough to not make big mistakes. For everyone else, they get to keep their retirement, etc. That's why I said 20 million.
And I'm thinking about more than punishment. It's about compensation. A CEO should be compensated for making good long term decisions, and if it turns out they have not make good decisions, they should retroactively lose compensation, but not be left in ruin over honest mistakes.
As for criminal cases, apply criminal penalties, which are beyond what I was suggesting.