And if it’s shown that the top of the laffer curve for high income earners is 76%?
*sigh*
You just said you've 'been able to find no empirical evidence that shows a statistically significant link between tax rates and GDP growth'.
Presumably had you found a cite that says Laffer +76% yields -- well you haven't revealed any supposed corresponding tax revenue yield, unless you're suggesting +76% is the apex of the Laffer curve, and I can't LOL enough at that -- so cite your cite.