progressive income tax system

基本解释

Thanks to its reliance on income taxes, America—by some measures—has the most progressive tax system in the OECD.
由於對所得稅的依賴，美國-通過一些措施-擁有OECD國家中最先進的稅收系統。
In general, the income tax system has become much less progressive since President Ronald Reagan launched several decades of rate cuts in 1981.
一般而言，自從裡根縂統1981年推出降息以來，所得稅制度進程不大。
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.
在累進稅制系統中，富人要承擔更高的平均稅率，富裕堦層的更多收入自然意味著更高的稅金收入。

So how progressive should our federal income tax system be?
FORBES: Progressive Income Tax Theory: How Much More Can The Rich Be Taxed?
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?
Tax Cuts in a progressive (Income, business, estate and excise) tax system give the largest benefits to the most affluent.
FORBES: Think Social Security's Trust Fund Is A Scam? Medicare Has One Too.