Most of the recipients of the Bush tax cuts are middle class. Raising their taxes is going to reduce, not increase government revenue.
The Laffer curve is ignored and reviled by the left and abused by the right. All that the theory says is that there is some tax rate, strictly less than 100%, which maximizes government revenue. This necessarily implies that sometimes, lowering tax rates will increase revenue (c.f. Great Britain in the 1970s).
However, it is probably not the case that we are on the side of the Laffer curve which allows us to increase revenue by lowering tax rates. The one study I know of on the topic is this one:
http://www.nber.org/papers/w15343
Quoting from Wikipedia
I would have thought the optimal rate was a
little lower.
