If consumers don't have the wherewithal to spend because all the money's going to the top, and the people at the top only spend a very small fraction of what they earn, then the economy is almost inevitably destined to slow.
Robert ReichCutting taxes is not bad. But if you cut taxes on the wealthy, which is what they wanted to do, you're not helping people who need better schools and better infrastructure and healthcare. You're basically robbing the middle class and the poor to provide tax cuts to the rich.
Robert Reich