It should be mentioned that tax rates were reduced for all brackets as part of typical Republican tactics.
Brownback's approval ratings were in the dumps before this law was passed (30%), imagine how low they will fall when Laffer is proven wrong for the millionth time. The Republican attempt at justifying this tax cut is hilarious, just admit you want to make the government smaller and be done with it. Don't try to rationalize your asinine behavior by referencing discredited economic theory.
The Laffer curve is correct at some point, the issue is just where as rates go up. Having said that, I have told Laffer (a former professor mine) to his face, that the curve in the practical zone was silly and way over hyped. He did not have much to say. He is not an intellectual heavy weight, but rather more of a promoter.