I may be in a minority here, but I do not believe there is a puppet master over and above the GB. Truth be told they themselves don't seem to really be living high on the hog. Not Rutherford style anyways.
I think the organization has taken ona life all its own. A corp as very well pointed out by jgnat, becomes a beast that needs to be fed. CEO's, founders, chairman, can all come and go, but the beast remains. There are of course many more factors than that, but you get my point.
I think the GB for the most part, are true believers. I think they really believe what they do, and are s subject to the mind control and processes that all of us have been to a certain point. Of course anyone not accountable to anyone else for their actions other than the few people at that table, have to have a different view of things.
I don't think the ex community can have it both ways. The WT is either cash poor or it isn't. Most of their "assets" are brick and morter, and a massive recall of these things usually does not yeild a subsaquent financial benefit. While I believe their handling of money is very shrewd and certainly borderline, I don't think there is a puppet group reaping the benefits. I just don't think that is the reasonable conclusion. :)