The reason is actually quite simple. Psychological issues, such as depression and being unsatiable because nothing is ever enough, boost our dopamine levels as we seek instant gratification. Shopping is said to improve our mood, but its effects are pretty temporary. That's why it's common to see wealthy people buying a ton of unnecessary stuff. It's an undeniable fact that money plays an important role in your happiness levels; however, there's actually a study that shows that this effect applies to a certain extent; more money doesn't necessarily mean you'll be happier as a result.
Personally, I try to avoid unnecessary spending; I honestly prefer a more minimalistic way of living; and I want my purchases to get my money's worth. For this very reason, I'll keep paying attention to the price tag, no matter how much I'm earning.
That's one of the most unlogical absurd psychological issue we have. We should adjust our needs according to our incomes. That's because we have a fixed income, meaning there are limited options for us to choose from. Shoping can be done to improve our moods. But is it necessary? I say no. I imagine how a shopholic person lives out his person. He eats more then he can digest. This kind of irrational behavior will make him suffer in the long run. It's fine for the rich to spend recklessly. They have more than enough. But if you refer to those who arent that rich but still spends recklessly, those should stop at once.
Unfortunately, it's quite common behavior. The majority of people I've met have the tendency to spend more money than they earn. While it's understandable to do it to a certain degree, it's ultimately disastrous for your finances. A higher salary should result in growing your savings account and putting some money aside for investments. At the same time, you'll be able to live comfortably while you'll be building your future simultaneously.
Improving your mood through shopping puts you in a vicious cycle of needing to shop in order to feel better. Whenever you're down, it provides you with the necessary dopamine boost, which will get you through a tough day. It's not bad to occasionally shop for a few clothes, etc., but it can easily become an addiction. Moreover, it can also easily turn you into a hoarder if you keep purchasing unnecessary stuff.
I haven't gone shopping for clothes for quite a while, and at the same time, I've gotten rid of older clothes that didn't fit me or were worn out. I've now tidied up my wardrobe and significantly decreased the number of clothes I had. I generally prefer to have less stuff that I'll actually use. I'm now claiming that I'm a perfect example of minimalism and against capitalism ideals. I've done my fair share of junk shopping from Temu or Aliexpress, but at least the majority of the items I bought were tools or that can be put to good use.