Poor buying when things expensive they are expert buying top in everything and FOMO in also the middle class are expert on buying highest prices and not just buying they buy it with credit.
Rich buys when something is with good price low price poor buys just to spend money.
Middle class behave like poor too they buying expensive.
Whether rich, middle class or low class, everyone should plan their expenses properly. However, especially the rich and middle class need proper planning before spending. However, instead of just spending, they should also focus on saving and investing. Financial education is very important for everyone, whether rich, middle class or low class. If they can control their expenses and create a budget properly, they will be more financially stable and confident.
You make a lot of sense, and I don't know why people like to differentiate between classes, after all, we are all humans and the most important thing is how we manage the resources in our hands and continue to be financially free/stable. Of course, the rich will have more money to spare than the poor, at the same time, if care is not taken, mismanagement can be a disaster. The same goes for the poor, there's a limit to what should be spent before it is termed frivolous spending, which is why all classes must ensure prudency.