Didn't @pumpkin or @freedom always control who was a top 20 witness? Sun can just do the same thing if he wants to. You also have to take into account that you are not going to be able to convince everyone to vote for your idea which, by the way, is a good idea in theory, but it is a fact there are over one million members who are no longer even active I would think some of them do have some of that 90m SP you talk about. I think really that this is out of our hands.
Also humans tend to follow the big guy in this case the huge guy, so I think many will just go along with him.