I think it's safe to say that no one could make Elvis do something he didn't want to do, including the MM and even his father. Attempts to intervene were more likely to be met by the guys being fired than anything else and then what influence could they possibly have from afar? I do think that the motivations of the MM varied. Some were true friends and some were simply hangers on. One thing I'm sure of, there wasn't one single member who could have intervened to stop Elvis touring if he wanted to tour. The Colonel had that power as he controlled the contracts, but Elvis' welfare didn't seem to be a top priority for that man. The mighty dollar was far more important.