Why dont you point out where middle and low income earners would get less money by extending the Bush cuts. Higher income earners PAY A HIGHER RATE and the rate reduction was smaller for the highest bracket than it was for the lowest.
As it stands now, if the cuts expire, high income earners would go from 35% to 39.6% while the lowest income earners would go from 10% to 15%. Allowing the Bush cuts to expire also eliminates an entire tax bracket for the lowest earners.