Leonhardt says that there is little reason to think that the flatter rates are better always. With the need to finance Medicare and health care for all, the government can use the extra dollars from taxing the very wealthy, the very rich in different tax brackets. The top bracket in 2008 started at 357,000, and you paid 35% whether you made 400,000, or $4 million, or $40 million. So basically the upper middle class was lumped in with the extremely wealthy. And considering the cost of college tutions for 2 or 3 kids, the upper middle class is only middle class. It makes sense not to lump the two together. Considering that there has been a lot of wealth accumulated at the the very high end, it would also reduce inequality, generate tax revenues for health care, and not have much effect in the incentives for generating economic growth. It is something he says the Obama adminisstration may and should consider.