" at the country level, there is a strong correlation between the size in the cuts in top tax rates between 1970 and today, and the increase in inequality. Germany, Sweden, Spain, Denmark, and Switzerland, where top marginal tax rates stayed high, did not experience sharp increases in top income shares. In contrast, the United States, Ireland, Canada, the UK, Norway, and Portugal cut the top tax rates significantly and experienced large increases in top income shares. "

― Abhijit V. Banerjee , Good Economics for Hard Times: Better Answers to Our Biggest Problems