Quoting Dr. Paradigm Shift:" I think it has to do with our disgusting obesity rates, and the "food" we consume like a bunch of pigs-and ... [snip!] ... many conveniences. Most people will drive two blocks rather than walk, stuff like that. Generally, we are pretty damn lazy. "
Physically, as a whole, we are very lazy (I live in Ohio, one of the fattest states in the nation!). But our work ethic is brutal. I've heard stories of women giving birth on a Thursday and are back to work on a Monday b/c they can't afford to take the full six weeks off.
But I do agree, in some aspects, we are lazy. We like our sitting jobs, we look down on blue-collar/labor work, and yet we suffer from workaholism. But then you look at other countries complaining about not having this or having that benefit cut, things only Americans can dream about. Australia and Canada look like luxury suites next to our ghetto duplexes.