If you haven't wiped out their corporate savings and sent the stock price tumbling, you haven't really done anything to get the needed recompense and to discourage the behavior in the future. Right now, many companies are effectively sole proprietorships or partnerships with window dressing made to look like there's real accountability. If it becomes impossible to oust the CEO, you're not a shareholder, you're a bagholder.
What you really need are lawsuits against individuals to be held accountable, otherwise it’s a lose-lose for shareholders.
Perhaps after a few high-profile cases, IPOs won't be structured to give absolute control to one person.
That, or you make the ousting of the execs in charge the settlement instead of massive monetary damages.