The minimalistic approach he takes is one I follow to a degree myself, but for radically different reasons than he does. I've found that having extraneous things don't make me any happier. Actively rejecting them as part of a radical lifestyle doesn't make me happier either. I am happy because I don't notice them missing, because I don't need them and don't have anyone around reminding me that I should or shouldn't.
The reason I define his lifestyle as radical is because of this.
"I hate civilization as much as anyone, but in these last few years before it crashes, we should appreciate and use what it offers."
Civilization is not going to fail any more than every time prior where it was purportedly on the brink. If you are using this as an excuse for anything, please stop now. You are actively contributing to problems that, if civilization could fail, might cause it to do so. As romantic of a notion as this might be, it will suck beyond belief if it actually happens.
The other notion, that somehow our economy must either be Utopian or negatively-amortizing itself into oblivion, is stated as truth with nothing more than sneering toward idiots, elites, and robber barons as the perpetrators. I normally try to be more cool-headed than this, but this claim is bullshit. There are other options, and given incentives and perspective, people will pursue them. And the incentives are there, for them and everyone else, if people would knock off all of these various scorched earth policies.
The perspective this author offers will keep them from pursuing those options, if people listen to him. I want to liken him to a reader of tea leaves, who's motives may not be less than wholesome; is the tasseographer offering a vision into your future, or are they merely attempting to influence your frame of mind for their own benefit?
It is that frame of mind which determines whether or not you think doing hard work that you love for money is possible or desirable. I think it is possible; I've seen people do it. The author would like me to believe these people are living a lie, and are probably depressed and putting on an fake image for me. I wonder if he believes any of the depressed people are faking it?
As to whether it is desirable, this depends on one's frame of mind. Do you believe that a difficult problem you solve today will matter tomorrow? Do you believe that, if someone pays you to solve that difficult problem, it will matter less than one you solved for free? Do you believe that your work will benefit both yourself and society in some tangible and sustainable way? Do you believe that some impending catastrophe will render all of your work irrelevant? How much of this is passive believe, and how much of what you believe dictates your actions and the influence you have over the eventual outcome?
This really comes down to frame of mind, which seem more and more like matters of faith. You might think civilization sucks; you might think money sucks; you might think doing anything but the bare minimum amount of work to survive another day sucks. I would disagree with all of these claims, but how would I have a reasonable discussion about this? How do you change someone's frame of mind when the validation they've been seeking for years might finally come to pass tomorrow? In a way, I think the first step is realizing that our frames of mind are not without consequence.