The idea, I suppose, is everyone gets the same degree of punishment for the same offense.
So, for a given offense, you lose X percent of your daily pay. It would be fair, I suppose. But do you really think the rich in this country would ever allow it to happen?
Of course not. Besides, they already consider themselves above the law and have enough little lap dogs around to run interference for them. The rich wouldn't be the ones who refused to let this happen--suckers who think they'll finally hit it big one day at Casino USA would be the ones most vocally opposed.