Rich Americans Aren't the Real Job Creators. The gist: the rich aren't job creators, but rather are idea creators. If you're already rich, and public policy (including the tax code) protects your wealth, you have no incentive to create new ideas. So there's no reason to give tax breaks and other incentives to anyone who is already successful, but rather use policy to promote competition among new ideas.
Seems like a good argument to me. Doesn't seem like either political party is buying into it, though.