求翻译：本文认为目前个人所得税在累进性设计上存在缩小收入差距作用不足，创新性的提出调整个人所得税的应纳税所得额与税率之间的搭配。是什么意思？

This article believe that the current personal income tax narrow the income gap between the role of progressive design, innovative match between taxable income and tax rate to adjust the personal income tax.

This article believes that the current personal income tax in Dar-es-Salaam on the design role reducing the income gap between the lack of innovation, by adjusting the personal income tax on taxable gross income goes to taxes.

正在翻译，请等待...

This article believe that the current personal income tax progressivity design narrowing income gap exists on less than, innovative adjustment of taxable personal income tax and tax rate: the match.

This article thought the present personal income tax has the reduction income differential function insufficiency in the progressive increase design, innovative proposed adjusts the personal income tax to be supposed to pay taxes between the obtained volume and tax rate matching.