There is a certain level of desire for anything. Once you reach it, your desire for it will decrease. Money is something that everyone seeks to achieve. However, once you reach a certain stage of wealth, you will begin to search for something special of your own, for example a car with limited editions, a phone with a personal design, or a designer dress. Especially for you, or a rare piece like a painting. All of these are reasons to satisfy the desire to get something new and in exchange for it you may pay 10 times the money. Therefore, contentment is better, setting a certain level of profits according to the money in your hands, and striving to improve your financial situation year after year is better than searching for more money, and you deserve to get thousands of dollars per month.
You gave many good examples and from small desired things like phones, car, etc. I would like to give bigger examples. Some billionaires are very rich but they don't buy luxurious assets and just live their simple life. With them, simplicity is best and some people like Bill Gates even left his powerful position because it will help him enjoys his life with less pressure and stress from powerful position.
When you are poor, you want to be rich but when you are rich enough, you will find ways back to yourself. Look at your soul, with meditation, connect back to wild environment and assets mean nearly nothing important with you.