I disagree with all the reasons he listed... because this is true of all careers, not just programming. I think it has more to do with our ideas about pay more

I disagree with all the reasons he listed... because this is true of all careers, not just programming. I think it has more to do with our ideas about pay more than anything else. Quite simply put, in almost all professions you're paid for being there for 9-5. If you show up and do your work poorly or not at all, you might get fired. If you do well, you will get a small raise. So to a small extent productivity is correlated. But the salaries aren't proportional to productivity; the biggest predictor of salary is if you're fulltime. You're getting paid for your time, not what you're producing.