Couple of points: (1) median would be more insightful in this context than average and (2) neither do a great job of describing a range of situations like the t

Couple of points: (1) median would be more insightful in this context than average and (2) neither do a great job of describing a range of situations like the term "middle class" does. Your point could be changed to "a family with average discretionary income could afford a few $130 per plate meals", but again my point is it's difficult to sweep that across a term that is increasingly describing a very broad range of financial situations.