Over the past few years, I've posted many times on an unpleasant reality: despite the fact that so many people believe otherwise, in general, lower taxes do not result in faster economic growth. It is really too bad, because we could all be better off if only lower tax rates led to faster economic growth. However, the association between slower econoimc growth and lower tax rates is something we can see in data from the US, whether we use national level data, state and local data, or anything in between.Read it at Angry Bear
Here's a post I wrote not that long ago noting that when top marginal tax rates are below about 65% or so, cutting taxes is associated with slower economic growth and raising taxes is associated with faster economic growth. Here's something a bit more academic showing the same thing.
As I've noted before, there's a logical reason why lowering top marginal rates slows economic growth (except when top marginal rates are very high), and it should be obvious to anyone who has ever run a business: the easiest way to avoid, or at least postpone paying taxes for is not to show taxable income. If your business looks like it will show a profit, reinvest the revenues, pushing up costs and voila, you don't have any profits for the IRS to tax. But, by doing so, you are also strengthening the company, which means setting the stage for faster growth in later years. And you're more likely to follow this strategy, rather than consume your profits, the higher the tax rate.
Notice that this little story depends entirely on the self-interest of people in the economy. Money collected in taxes could be put in a big hole and burned, and the story would still work.
Taxes and Economic Growth: Real World & Simulations
by Mike Kimel
Michael Hudson makes a similar argument for high marginal tax rates. They spur investment and more equitable distribution of profit, as well as increase charitable giving in order to avoid having to send money to the government, while decreasing economic rent and rent-seeking.