美国政府为了增加税收收入,1991采取以下措施: 一、调整个人所得税免税额,预计一年可增加税收35.8亿美元; 二、调整个人所得税扣除额,预计一年可增加税收21.6亿美元; 三、将个人所得税的最高税率从28％提高到31％,预计一年可增加税收22.4亿美元; 经过上述调整,个人所得税的累进性有所增强; In 1991, the U.S. government took the following measures to increase tax revenue: First, to adjust the personal income tax allowance, which is expected to increase tax revenue by 3.58 billion U.S. dollars in a year; Second, to adjust personal income tax deductions, and increase revenue by 2.61 billion U.S. dollars a year; The personal income tax will be the highest tax rate increased from 28% to 31%, is expected to increase tax revenue of 2.24 billion US dollars a year; after the above adjustments, the progressive personal income tax has been enhanced;