Why should I work more? How will that improve my life? My self-worth is derived from what I do outside of work to the extent that I don't prioritize professional validation. The primary reason I work is for money. I make enough money that I can live a comfortable life, I have few material wants, and I can be generous with my money. I am on pace to likely be able to retire in my mid-50s. I recognize that I likely could be making more money if I worked harder, but it wouldn't be proportional because compensation is not tied closely to production for individual contributors. A 50% increase in effort won't yield a 50% salary increase. Most of the added value from my increased effort would be captured by people above me in the org chart and our company's stockholders.
As it currently stands, I don't find it that difficult to find a new job. I do spend some time keeping up with the industry, I am on HN after all, which tells you I care more about software development as a skill than some of my coworkers. It isn't that I dislike the profession, I simply don't see the reward in working harder primarily for the financial benefit of other people.