I seen and lived this until I got my wake up call.
I was regular upper middle class, I would laugh at people who thought I was poor for having an Android because I could easily afford a $1000 iphone, I just didnt want it.
Then I got into philosophy and inevitably Stoicism, where I found happiness within.
Then I read too much philosophy and realized the promises of such ethical philosophy were harmful to my own well-being. I went full Nietzsche and realized that spending money was a demonstration of power. As Thomas Hobbes says: 'Fame makes more fame, power makes more power.'
Thus, pointless lavish spending does have a point, its to demonstrate power, which grows power.
I genuinely feel like 30+ years of my life I was tricked into a religion of modesty against my own interests. Meanwhile, the people I mocked, rappers/rich people/etc... had the right idea. Or at least right in my current set of Values.
(And if you disagree with my values, prove I'm wrong, best of luck, there is nothing backing pure reason, and if you want to be an empiricist, we have peacocking)