They did it again, even more decisively in World War Two, and that's how we got progressive taxes.

而二次世界大战时，他们毫不犹豫的，再次提高了对富人的征税，这就是累进税的由来。

耶鲁公开课 - 金融市场课程节选

You have a progressive tax system that takes more money from the wealthier people and you have a welfare system that looks at individual hardship and pays out.

我们有随富有程度加重税负的,累进税制,还有关注个体并进行再分配支出的,福利制度。

耶鲁公开课 - 金融市场课程节选