#特朗普税改 The Tax Cuts and Jobs Act signed by Trump in 2017 is the largest tax reform in the United States in thirty years, with core elements including reducing the corporate tax rate from 35% to 21%, simplifying personal income tax brackets, and raising the exemption amount, while allowing multinational corporations to repatriate overseas profits at a one-time low tax rate. Supporters believe it boosted corporate investment confidence, drove up the stock market, and lowered the unemployment rate to historic lows; critics point out that the policy is clearly skewed toward the wealthy, as estimates show the top 1% income group enjoyed 20% of the tax cut benefits, while the federal deficit surged over 50% within two years, exposing structural flaws that exacerbate wealth inequality and fiscal sustainability. In the long run, the impact of the tax reform on the real economy has been weaker than expected, with companies using more of the tax cut savings for stock buybacks rather than expanding production.