I'm coming around to this idea, too.
The real problem is the way the "punishments" work: they penalize active old characters, while being practically no hindrance to the idle old fogies we most want to discourage.
So I'd be open to ideas that more harshly penalize people who take a position, then sit there doing nothing with it, while not making life hard for those characters, young and old, who add spice to the game.
And there lies the problem... What on earth can only affect the idle oldies, but not the active oldies? How could the game tell them apart?