1: The group we should measure to discover how the middle class is doing in America depends on how you look at the statistics and information given by the government or economists.
2: It only makes sense to exclude the elderly because they live mainly off retirement funds, rather than those that currently labor for these funds.
3: The composition of the middle class is important to assess the performance of the economy because statistically speaking, on average there are more Americans in the middle class than any other class.