In that process, one creates wealth that creates jobs for other people. Then they can buy stuff as well.
In parting, I dearly love 'rich' people. They hire people like me to do the jobs they need done and don't have the time or inclination to do themselves. That has provided me with a decent living and I had fun doing the work.
make money to buy the stuff you want
**************
Yes, by all means and especially if you earned it. But serial buying for the sake of buying or acquiring stuff merely to impress others is foolish and often financially self-destructive.