I don't think I'm qualified to provide an answer - trying to detail how execs should not be able to profit from fail-cases like this is a mine-field of edge cases, I expect.

I do think that you shouldn't be doing anything to destroy their lives "no pension" (outside of any judicial outcomes); but it should be sufficiently comprehensive such that you can declare both that no one profited from malfeasance/incompetance and that poeple in positions governed by these provisions are strongly encouraged to make sure that they don't fall foul of them.