The need, desire, want and willingness to pay.
There are some needs that are uncompromisable, need of food, place, clothes, workspace, transportation, devices. I need to fulfill them one way or another. When I have more money I purchase better service, Zara | Numero Uno. Innov8| BAL. Auto | Ola. 3A | Sleeper. Based on earning power, there are categories of service for different class of people. The more money more comfort, ease, quality and less hustle I am looking for. Someway these fundamental needs has to fullfiled. These are mostly survival aspect.
Then comes the first layer of what matters to me. Personal importance, in my world these things are important. Meditation | yoga | books | courses. Beyond survival I find these things meaningful. They are important because they are solving certain unease in my life. As soon as survival is ensured I am willing to pay as much money as I can comfortably afford for these. They are somewhat desires for freedom.
Then there are some desires which are luxuries, 1500rs/haircut. Camelbak bottle. Audible. Adobe software. Eating at carrots. If I don’t have money I will not use them at the same time If I have more money I might ant that up. They are still somewhat related to fundamental need but being resolved in more refine manner.
Then there are desire which are being consumed because of low cost. YouTube is like that. Where I am either paying by attention or using it because it is free. Like svbtle.