对于一些收入稍低的家庭已经在这么做了，这些家庭一直在享有税务减免，这个减免属于布朗担任首相时推行的可怕而复杂的收益与负所得税一套体系。

This has already happened for lower-income families through tax credits, the gruesomely complicated system of benefits and negative taxation that Gordon Brown introduced when he was chancellor.

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负所得税向贫穷线以下人士或家庭提供收入资助的税务制度。

Negative income tax a taxation system where income subsidies are given to persons or families that are below the poverty line.

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