"A high school graduate in the 1960s could earn a middle class income through unskilled labor. This was an historical anomaly, and there's no reason to compare

"A high school graduate in the 1960s could earn a middle class income through unskilled labor. This was an historical anomaly, and there's no reason to compare wage data today with that of the past." Interesting response. One can also consider the shift toward the "service economy," which in many cases is lower-paying and even easier to outsource than unskilled physical labor like manufacturing and construction.