The goal of a great career, the goal of really powerful people, is to work as intensely as they can for the shortest amount of time possible. That's what you want to do.
This is my book! But, it's too much work putting out a book, so I don't think this guy is a real slacker, he just pretends to be. I always found that people who worked every second were pretty dumb. I always found ways to do a tenth the work, and then just flow like I was everyone else!
And at the end, I felt I earned more than Bill Gates, normalized by income per time worked!