The Economist May 16th 2015Title:The great distortion Abstract:Half the rich world's governments allow their citizens to deduct the interest payments on mortgages from their taxable income.It sounds prosaic,but the cost-and the harm-is immense.《经济学人》2015年5月16日刊大扭曲——免税的债《经济学人》封面文章指出,半数的发达国家政府允许公民从应税收入中扣除抵押贷款的利息支付;凡乎所有的国家允许企业勾销对应税利润的借款支付。这听上去没什么大不了,但是成本是巨大而危险的。