But the president says he will not let health reform be paid for in his words -- "on the backs of middle-class families."

VOA: special.2009.07.25

This is a sign of my economic status: I don't have to work. It is middle and lower-class women who do not get to observe purdah in this way.

但这恰好是我经济地位的标志：,我不需要工作，只有中下阶层的女人,才像这样不遵守深闺的习俗。

普林斯顿公开课 - 人性课程节选

"It is time to do what is right, not for the next election, but for the middle class."

VOA: standard.2010.07.19

"I think in Japan there was a collective identity as a society where everyone is middle class, everybody shares the same fate, there are not huge, wide disparities of income.

VOA: standard.2009.09.09