I know perfectly well who Sowell is. He's a right wing hack who makes money by telling right-wingers what they want to hear on economic issues. He's been doing it for decades now and has been giving the economics profession a bad name in the process. The actual amount of research he does to back up his statements his zero, but then he doesn't need to provide any actual evidence when all he does is tell right-wingers what they want to hear, as they are never going to ask for that evidence in the first place.
As for the sources for what I say there are plenty. The congressional research office has said this -
Then there is the IMF who have said this -
Then there have been studies done on tax cuts in US states and their effect on job creation. Again for anyone who has paid attention to the reams of evidence that have been coming out giving the rich tax cuts creates basically zero new jobs because tax cuts for the rich doesn't create economic growth -
I could go on and on but hopefully you get the picture now? This is what actual evidence is, not making some unsubstantiated claims and then posting the trash you write for $$$$ as Sowell does.
Oh and FYI you are clearly not understanding my inequality argument. What I am saying is that as inequality rises as the rich take a great share, this causes average economic growth rates to slow. And again this is backed up by lots of evidence.