Even assuming the median earner is paying the average for eating out (e.g. is a blue collar family of 4 in the Midwest spending the same proportional to income

Even assuming the median earner is paying the average for eating out (e.g. is a blue collar family of 4 in the Midwest spending the same proportional to income eating out as a childless professional couple on the coast? I'd wadger no.), you still need to compare that against the cost of groceries. So, it's more of an additional 3%-5% in reality, not a whole 7%.