I guess I read the title wrong, you are only applying inflation to tax revenues. I read it as tax revenue income vs. value stolen through inflation. To get that you would either compare total new money printed and borrowed each year vs. taxes or compare yearly inflation multiplied times all available dollars in the world, both physical and digital vs. tax revenue. Money is taken from us in the form of taxes (and it sounds as if your example includes only Federal Income taxes) and it is also taken by stealing purchasing power through inflation. This would be an even better story in my opinion.
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