But that makes Econ the "super GM" of every hotseat that comes up in the throne room. While he is moderator, he does not make the executive decisions regarding every game (nor would he probably want to).

The GM has every right to the passwords to his game. If you are not comfortable giving him the password, then you shouldn't play in his game.

If people want to keep their passwords secret, they can always start a "password secret" hotseat game where no one knows anyone else's password. Of course your basically rolling the dice but maybe all 5-7 people will work out fine.

If I run a kingdoms game, which I probably will when school slows down a little, I will simply demand every password before I even start the savegame. If people give them to Econ as well, thats fine but I will require them. And then I will test them. If they don't work, I will ask for the new one. If it still doesn't work, I will kill my game and restart it without the problem player. Anyone who does not agree with this can simply not play in my games.

I do not want to over-ridden in these decisions by Econ. It would become quite burdensome if I had to run everything past him. Plus he could find himself in a conflict of interest where he has to make a ruling between the GM and one or more of the players.

So, I'm all for Econ having a copy of every password in the throne room. But I think the GM's should have the passwords to their own game as well. This leaves the GM as the head of their game yet has a backup system if something happens.