The Marginal Tax Rate on the Highest Earners Has Dropped.
While Tax Revenue as a % of GDP has remained consistent.
The 'dark matter' in the equation is that the working class(*) has had to take up the slack in taxation from the super wealthy. For most of us, this comes about as 'fees'. I do understand, but not agree with, the strain of misplaced anger towards the public sector. The working classes have seen their tax burden increase over the last generation, but it is brought to them by the same folks who brought the world the financial crisis of 2008. Not teachers or snowplow drivers.
1'JEFF GUNDLACH: The US Economy Is A Complete Horror' - Business Insider
(*) Substitute Middle Class if one wishes, it is America where there is no Working Class.(TM)