求助逻辑一题

stoneren

The tax system of the country A encourages borrowing by granting its taxpayers tax relief for interest paid on loans. The system also discourages saving by taxing any interest earned on savings. Nevertheless, it is clear that A's tax system does not consistently favor borrowing over saving, for if it did, there would be no____
答案是: tax relief in A for those portions of a taxpayer's income, if any, that are set aside to increase that taspayer's total savings.
分析：对于增加储蓄的那部分收入，在原文中本来就没有提到过税收减免的问题，所以无法理解答案，请给个解释。
注：烦请用中文说明，最好举个例子，谢谢！

mindfree

其实这道题很直接, if A then what. A is country consistently favor B over S. Based on the test, if A, then a taxpayer needs to pay tax on the interests earned on the savings. The answer is straightfoward.

mindfree

这道题容易想偏,我认为还是从原文的逻辑关系出发,尽量不要out of scope.