But, just as many economists predicted, slashing individual, corporate and estate tax rates was mostly a windfall for big corporations and wealthy Americans.
A London School of Economics report by David Hope and Julian Limberg examined five decades of tax cuts in 18 wealthy nations and found they consistently benefited the wealthy but had no meaningful effect on unemployment or economic growth.
they set out to identify “major” tax cuts on the rich in 18 wealthy nations from 1965 to 2015. They then traced what happened to those nations’ economies in the five years after the cuts were implemented. They focused particularly on income inequality, economic growth as measured by gross domestic product, and the unemployment rate. They aggregated those trends across countries to capture the broadest possible picture of the tax cuts’ effects.
First, the tax cuts succeeded at putting more money in the pockets of the rich. … But they had no effect on economic growth or employment. Though those quantities fluctuated slightly after the major tax cuts that were studied, the effect was statistically indistinguishable from zero.
Given the evidence, why are such targeted tax cuts perennially popular among policymakers, especially Republicans? The authors point to one major reason — the power of wealthy individuals and corporations to set policy agendas through lobbying and campaign contributions.