If the article doesn't impress you enough, check out Thomas Piketty's book "Capital in the Twenty-First Century"...go to page 508 for a review of what 90% tax rates resulted in...but best you start on page 1 to appreciate why we tossed away an economy that benefitted everyone and built a robust "Middle Class".
Link: https://www.zocalopublicsquare.org/2017/12/19/eisenhowers-tax-policies-invested-future-not/ideas/essay/