This is from a 1993 book. There's no mention of the pretty pleasant 16-21 years that most Americans spend in education, compared to preindustrial labourers starting work before age 11. Or of the concept "retirement", which would have been hard for medieval peasants to imagine. There's also this pertinent commentary from 1995: https://www.clevelandfed.org/~/media/content/newsroom%20and%... "The central message of this…
From everything I've seen in the US, high school (age 14+) and college are more work than a full-time job, and many students also work a part-time job on top. I'm not sure "pretty pleasant" is quite so accurate.