I’m convinced that he’s just the ultimate insider. He knows where the bodies are buried and it is now crucial that he be at Treasury to make sure that investigators can be steered away from embarassing areas. He’s not there to solve problems (he doesn’t know how to do that), he’s there to protect the power brokers who screwed up.
Personally I do not think that it is a mistake that he is sitting up there at the Treasury Dept all alone. He is covering tracks for the democrats and their socialist/fascist friends. If there were others there then they would have to worry about someone talking.