Answer: You can't, but it's the same in many professions now. The root cause is the corporate manslaughter laws. In essence, the Directors (or equivalent) want a 'fall guy'. Careerists accept it and hope disaster doesn't happen on their watch; anyone with principles leaves. Worse still is that the Government/Civil Service doesn't care either. They just needs somebody's head on the chopping block when disaster strikes, to keep the media happy and therefore keep their own jobs. It doesn't matter to them that the person 'responsible' cannot logically be held so.