progressive income taxation

There is a case for progressive taxation, since the well-off can afford to pay more even as a percentage of income.

累进税率自有其道理，既然富裕者有能力在他们的收入中负担更多的比例。

QUESTION FROM ERIK DONNELLA: Would you explain a little bit about why a federal sales tax is a bad idea, and what the social value is of a graduated income tax and progressive taxation scheme?

埃里克.多内拉的问题：您能否解释一下为什么联邦营业税是个坏主意，以及累进所得税和累进税率方案的社会价值何在？

Progressive tax rate, as a major concept in The Taxation, is frequently used in income tax.

税率是税收学中一个非常重要的概念，在所得税中经常使用。