That could be something the graph might be intended to show, but it's unnecessary. What it does show, quite clearly, is that the burden on society as a whole f

That could be something the graph might be intended to show, but it's unnecessary. What it does show, quite clearly, is that the burden on society as a whole from people pursuing (and attaining) college educations is growing out of control while whatever benefit that is providing is insufficient to bring up median incomes. Maybe that's because a lot of people drop out and don't get degrees, whether that's true or not the ultimate facts still remain: a lot of people are being screwed.