I read this topic before the article, so I guess I had skewed expectations, but I find that he's right on most counts.
This "spend less than what you earn" advice is obvious for most people. Everyone gets that. hey just poorly implement it.
It is true that sometimes, peer/societal pressure will make you make choices that are not perfect, financially. That's alright. Once in a while, taking a pretty woman to a restaurant or on a weekend trip is really nice. I do it even though it means I'll have to work X more days. I'm fine with that, really.
Some of this stuff ("your gear") is really frivolous, but overall, I kind of agree with the general message, which I took to be that while we all know that we should spend less than what we earn, life sometimes makes that harder than it sounds to people (and I include myself there) who are a bit more affluent.