I'm not sure what being "underemployed" has to do with the actual blog post? The post talks about railroad workers and how the 40hr. work week got started, but

I'm not sure what being "underemployed" has to do with the actual blog post? The post talks about railroad workers and how the 40hr. work week got started, but I should point out that it's only in the US, really--other nations have other conventions. The Japanese seem to be trying to work themselves to death, for one (sad) example. The only concern I would have about being underemployed is that we only get a certain fixed number of years to save for retirement and if you're chronically under-saving during your years of maximum earning potential, the back end of your life may be pretty ugly. Then again, I am a pragmatist and I figure "life" can be as long or short as you desire it to be, right?