40 years of data across several countries demonstrate that tax cuts for the wealthy do not result in any significant increase in economic growth. They do produce significant gains in the share of national wealth owned by the very wealthy.
Of course these conclusions only apply in realistic conditions, not extreme examples (such as 90% tax rates).
This has been demonstrated over and over again. Cue the usual ideological responses re: taxation is theft, etc, etc.
http://eprints.lse.ac.uk/107919/1/Hope_economic_consequences_of_major_tax_cuts_published.pdfEdited by Knucklehead at 11:44:17 on 12/16/20