I sincerely feel American workers are motivated to work as here if you put in the hours of work you get paid more. I don’t think they are under any pressure from there peers, its all about going up the ladder and everybody here wants to go to the top.
Overworking when forced does lead to the feeling of getting exhausted and demotivated but in this case, I don’t think they are overworked as I said before they are volunteering for the same and there’s no need to feel demotivated.