在许多外国人千方百计想获取关国绿卡的情况下，美国一些有钱人乃至大富翁却纷纷逃离美国这个叫人梦寐以求的天堂，加入其他国家的国籍，令人不可思议。原来，他们更改国籍不是为别的，而是为了逃税，特别是逃遗产税。美国人自愿放弃所拥有的美国国籍，这种现象在过去是很少见 Under the circumstance that many foreigners want to get the Green Card of the Kwanchak, some wealthy people in the United States and even the millionaires have fled the coveted paradise of the United States and joined the nationality of other countries. This is incredible. It turned out that their change of nationality is not for anything else, but for tax evasion, escaping from estate duty in particular. It is rare in the past that Americans voluntarily give up their American citizenship