This is the immediate effect of Reagan's tax cuts for the rich. Little has changed since then.
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The politics of envy is the best issue the Democrats have. When they exploited it they dominated the United States. That was not all. From the end of the Second World War to the last year Jimmy Carter was president the national debt as a percentage of gross domestic product declined from 114% to 32%.
During this time the top tax rate never got below 70%, and was often higher.
https://www.irs.gov/pub/irs-soi/02inpetr.pdf
As a result of Republican tax cuts for the rich, the national debt as a percentage of GDP grew to 129% during Trump's last year in office.
Now Republicans are using the rise in the national debt for which they are responsible as an excuse to cut domestic programs they have never liked, but which they know are popular with the voters.
For years public opinion surveys have indicated popular support for a more progressive tax system.