I'm always a little skeptical of statistics published by small groups with an agenda, but those numbers may be close as far as I could tell with a small amount of sleuthing. There seemed to be a little better picture if you excluded age groups under 25 years of age. In my mind the migration of manufacturing overseas and automation of jobs is a big factor. I worked for a manufacturing company for part of my career and in my later years of employment it was getting hard to find temporary workers to do relatively hard manual labor that paid fairly well, say $15 dollars an hour, and a chance of well paid permanent employment with health and retirement benefits. Rumor around was that people would rather work easier jobs in the service industry that paid minimum wage. So I think there is something to folks being lazy. I also think there is something to the overweighted wages of upper echelons and enormous wages of CEOs, where wage distribution is not fair to the lower incomes.