There's nothing wrong with buying luxury items, even if your salary is not that impressive. You can't say people who have huge investments and high incomes are the only ones who can buy luxury things, and it's not for low-income or low-investment people. Low-salary people who save their money and spend it all on buying their dream luxury watch, phone, or car—I can't see anything wrong with that. And I don't believe saving or investing money is the only way to have a great life because money is for spending too. Very rich people use local products, not branded ones. This behavior is their humbleness and down-to-earth category, but the poor buy luxury; it's their show-off and greedy behavior. Don't you see the irony here?
There is nothing wrong with people buying luxurious things. But only when you dig deeper, you see the bigger picture. An average bottle of perfume could cost $2 to $3. And if you want a fancy one you can go for something that costs $5 to $10. How much do you think those perfume production is? And what's the difference between a regular average perfume and a luxurious perfume? There is a bit of difference in cost and materials for the making. But when you sum it up the difference is not that huge. That does not sell the product instead they sell the brand.
Money is for spending, I get your point. But money is also the thing that makes more money. It is the rich people who brainwash middle class or poor people to pursue luxurious thing. In business someone else's loss is someone's profit. Where do you think those rich people get their money? Do they print it? Of course not. They get it from people by brainwashing them into thinking they should pursue a luxurious life and buy luxurious thing to be more like rich people. And rich people are not stupid to show humbleness or down to earth something like that. Instead of using that money for luxurious thing, they put that money into investment in order to make it more.
I don't know from where you got that idea. Be sure to dig deeper next time. You will get to see the bigger picture.