Take this with a grain of salt. The definition of &quot;middle income&quot; is flexible. For example, in the Pew analysis &quot;middle income&quot; is defined as between $45,115-$135,346 in 2013-2014 dollars for the year 2000, but as between $41,641-$124,924 for the year 2014.<p>Given this difference it&#x27;s unsurprising the Pew analysis finds the upper class grew, but since the definition shifts we should be suspicious of the meaning of this statistic.