Such deductions, which are worth hundreds of billions of dollars a year, narrow the tax base and distort behaviour, and their benefits flow disproportionately to the most affluent taxpayers.

• 这些消减的税款达到每年数千亿美元之巨，从而消弱了税基，也扭曲了行为，而且减税的好处大多被最富裕的纳税者占去了。