Sour grapes. Could be titled "People with money decide how to spend it, and I'm sad to be left out"
Since when is it not valid to analyze how people with money spend it? History teaches us that we should look out for the moment when the powers that be in any social order stop investing in the social order and become mostly extractive.
The desire of elites to separate themselves from the masses is a general symptom of systemic failure. (Not that I'm against libertarianism -- I believe they are correct about being judged as individuals -- but if your answer is semantically equivalent to, "because no one's let libertarianism prevail yet," then I'm going to reply, "evidence?")
Not to mention that it is very much debatable if any actual analysis was performed for this article. Admittedly I bailed after the 4th or 5th paragraph of entirely unsubstantiated rambling, but I digress.
No one's analyzing anything here, and no one needs to have for the purpose of my statement. The apparent assertion that I'm countering is that there's no point to "complaining" about how rich people spend their money: this is demonstrably false. There's a ton of examples both historically and in the current world. Whether or not there is any analysis in the comment, the op, or the book being referenced is peripheral to the point.