My sampling bias is of college grads living dirt poor, had been, have been, will be. Recent friend was praying her car would not break down because she could hardly afford gas, let alone to do any kind of repairs. Sampling bias is a bitch. Do you have numbers otherwise that it is really just lifestyle outpacing income for college grads? Perhaps the outcomes of college grads are skewed, devil is in the details. The experience of college grads is pretty certainly washed away when looking at medians of much larger populations.