The report, which studied changes in income after accounting for federal tax and inflation, found those in the middle also saw their wages grow slowly in comparison with the better-off.

• 此份报告研究了包含联邦税收和通胀因素后的收入变化，报告发现，中产阶级也认为，与富裕阶层相比，自己的工资增长速度缓慢。