Research suggests that once you have sufficient income to meet your basic needs, that travel time is one of the biggest factors in job satisfaction. I think we tend to focus on income because it's much easier to evaluate the actual pay rate of a job - if you're promised $100K, you can expect 100K. If you're promised 40 hours and no overtime then you'll often find that tested. If you're promised low stress and high job satisfaction, well, good luck suing for breach of contract on that.