In a progressive tax system, where richer people pay a higher average tax-rate, more income going to top earners automatically means higher tax revenue.

在累进税制系统中，富人要承担更高的平均税率，富裕阶层的更多收入自然意味着更高的税金收入。

youdao

Under a progressive system, the amount of a tax owed depends both on the person who earns the income and the year in which that income is received.

累进税的多少则取决于挣取收入的个人以及收入发生的年份。

youdao

So how progressive should our federal income tax system be?

FORBES: Progressive Income Tax Theory: How Much More Can The Rich Be Taxed?

Since our federal income tax system is progressive, the more money you make, the more tax you pay at the higher end.

FORBES: Study Shows That Numbers Of Working Moms Have Increased: Is That A Good Thing?

Following the House budget resolution would almost certainly shift more of the tax burden to low- and middle-income households and yield a less progressive tax system.

FORBES: How Would the House Budget Resolution Affect Tax Progressivity?