[LeonM]

That's the whole point of the writer, he is his own boss, so suddenly it matters to be productive to make money, but it no longer matters when he does it.

I completely agree with the writer (being self employed). I no longer use alarm clocks, I only work when I feel like doing so and I often leave my desk to do something else to clear my head. (I can't "go home" since my office is at home). In the end, I am much more productive than I used to be when I was working for a boss. My work is also of much higher quality and I enjoy it a lot more.