Well, our tax rates are MUCH lower, and all of these studies are from before the massive cuts.... https://www.forbes.com/sites/niallmccarthy/2017/11/29/the-countries-most-reliant-on-tax-revenue-infographic/#6da28a3180fc The US is 7% below the OECD average, before the tax cuts. Imagine what 7% could do, let alone what the difference is now. South Korea, chile, Ireland, Mexico and Turkey are the only nations below the US. https://www.cfr.org/backgrounder/inequality-and-tax-rates-global-comparison