One of the problems in creating AND MAINTAINING a conspiracy is that the larger it is and the longer it goes on, one point (person) in it will develop a weakness, and that weakness will bargain to save their own skin.
With a conspiracy of this size and the length of time involved, this is absolutely certain to happen. It may already have happened. I expect one or more of the main players here to have an unfortunate accident or commit suicide by shooting themselves in the back of the head twice by the end of the year. That may put most of the pawns in line but it will also create additional weaknesses.
Good point.