Generally, for just plain old fraud or similar, this gets close to it for me. In this particular case however, where the wrong doing resulted in many deaths I think some other approach is appropriate.

I would really like to see more argument over why jail time is not an appropriate response for senior leaders within organisations that currently suffer nothing more than a fine. Where an organisation has shareholders if the fine is really big then the persons perceived as responsible will, presumably/hopefully, see their career prospects suffer but really to provide an incentive where the benefits can be supremely high I think seeing a few of your peers spending time in jug would help. I appreciate the problem is knowing who to jail and I appreciate that's a hard problem and I don't have a ready answer for it.