I'm not a TKD person and I don't follow the competitions, so I apologize if I'm stepping in where I don't belong.
However, if the situation has truly become unacceptable, perhaps the only solution is to walk away from it. This is of course a personal decision that would need to be made by every instructor, competitor and school, but if enough people simply abandoned the corruption that seems to have taken over the administration in Korea, then those corrupt individuals who hold the power, will simply hold no power any longer.
People only hold power when others allow them to. When enough people simply stop playing their game, then there is no longer a game to be played and they hold no more power. Let them play in their own sandbox, by themselves.
Of course this would probably mean the end of Olympic TKD, for better or for worse, but it may also open new doors for reorganization and possibly a new group could rise to take the reigns and get it right this time.
I don't know how such a movement would be organized. But if the cancer is too deeply entrenched to be removed, abandonment may be the only real alternative. If everyone who was disgusted simply abandoned the cancer, perhaps the cancer will die.