An old boss of mine used to say that he needed to work harder than the rest of the team because he was paid more. I don’t think it was 100% true, but it certainly was a very motivational thing to hear!
Working hard does matter. It turns out that working longer hours for men is correlated (and may even be the cause of) approximately 10% of the wage differential between men and women across all professions. Today, a provocatively titled New Yorker article “Are Men Overpaid for Overwork?” cites a 2013 study reporting that 40 years ago, men who worked more than 50 hours / week used to be compensated less on an hourly basis than those who worked less. By 2009, however, those who worked more than 50 hours/week were being paid more on an hourly basis than those who worked less than 50 hours/week. So where have hours increased most dramatically? Its not the blue-collar jobs, but the managerial and professional ranks. And its also in these professional and managerial professions where the gender gap in wages is the largest.