A2: With the fast living pace, fast food, which is easy to get, becomes more and more welcome among salary-earning class.

随着生活节奏的加快，快餐便捷。 所以受到越来越多工薪阶层的欢迎。

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Growing income inequality has coincided with the increasing importance of a college degree for earning a middle-class wage.

收入不平等加剧的同时，大学学位对获得中产阶级收入的重要性也在不断提高。

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Marriage means two incomes at a time when most Americans find two incomes essential to earning a middle-class livelihood.

CNN: To rebuild middle class, restore marriage

Considering no one can save every dime they earn, not even quarter-millionaires, all bets are off that a guy earning that standard middle class pay is going to become rich in his or her lifetime.

FORBES: Despite Crisis, Most Americans Believe They Will Be Rich One Day

He could care less about the embattled middle-class UAW workers earning more than a hundred grand.

FORBES: Ohioans Are No Fools: Obama Did NOT Save Your Automotive Jobs (Update: Fact sheet at the end)