Check out the Madoff documentary on Netflix, there are interviews with people who had exactly that happen as they clawed back funds to try to make everyone whole.
Not sure if this type of cynicism is more Reddit than HN, but somehow I suspect the rules are more likely to be written by the guy with the 5M deposits and his even richer friends.
"No we're taking your $50k life savings back so we can give it all to a client that had $5mil and deserves your $50k life savings more than you do"