Imagine you have 20+ years remaining in your dream career and you have a golden opportunity to blow the whistle, in a very public and news-making manner, on a criminal conspiracy in the department you work in. It is a conspiracy that made your company billions and with which you could be reasonably associated by innuendo. The likely end result of your quitting and blowing the whistle is that your career in that and related industries is effectively terminated, with you yourself potentially facing sanctions for that. The alternative is ride it out, hope that it comes to light through other means, you get cleared in the investigation, and you get to continue your career—although, also, it may never get exposed as long as you're there, and you may end your career with no one the wiser and your cushy retirement assured.