If you think anything I said was gibberish then demonstrate it; don't hand-wave at it.
I have given a rationale. It was not especially complicated but, then, this is a thread on hacker, and not a manifesto. I don't see why identifying a paradigm case of conspicuous consumption requires that I offer either a comprehensive program of public policy, or a normative philosophy of what one should and should not buy. I can perfectly well defend the proposition that people who buy $4000 pens are doing something terrible on its own terms. Which I have been doing.
My position is straightforward: there are reasons based on cultural capital, and on political economy, for the proposition that those who buy these pens are worthy of contempt. I broke these down as follows above:
1. Distributional: in that the $4000 pen is functionally useless relative to a pen 1/100th its price, and that we live in a world of palpable inequality where billions of people live in misery, to buy the pen is to suggest that you think very little about other human beings
2. Ideological: This is a little more complicated. I have the view that capitalism is a system that has an inherent drive to inculcate the desire for commodities, whether or not they are especially useful or not. This is a kind of genetic argument (you have the desire because and only because of the economic conditions in which you live), and an ideological argument (that desire is created by and supports capitalism; it helps to perpetuate a very unjust set of relations by giving you highly distorted preferences).
3. Cultural: these kinds of items are part of a cultural game of symbolic capital played among the super-rich, by virtue of the fact that they have everything (and more) than anyone could possibly need, and need to find some other way of differentiating themselves from others. It has much the same function as buying branded clothes - the desired property is not the clothing, but the status that comes with it.
4. The above 1-3 suggest that whoever buys a $4000 pen is a shallow person who doesn't care about other humans, and who is unduly concerned with their social status within a sub-culture of similarly noxious people.
"Oh, really ? What a surprise ! A sadly common trait amongst hateful and judgemental people who show blatant inconsistencies coupled with a compulsive need to press reply."
Again, if you think that I am somehow inconsistent then demonstrate it. Don't just allege it. I don't really see what the word 'judgmental' is doing here. Yes, I have an evaluative take on conspicuous consumption - this seems like a fairly standard kind of evaluative thought. Do you not evaluate the social world? The allegation that I have a 'compulsive need to press reply' is also rather strange. I have replied once to each reply to me.
I am not hateful. We just live in a very unjust world.