Chris Espinoza on the 99 Percent:
Those who argue that a flat tax is a fair tax miss this mathematical fact. A flat tax accelerates the fall into poverty of the lower middle class by increasing fixed expenses so that a surplus is impossible, and it falls into the noise of the fixed expenses of the wealthy and simply shifts the floor, but not the steepness, of the logarithmic wealth curve. It would cut the middle class in two.
( Via @gruber. )