What is the relationship between income and consumption?

The higher a person’s income, the more he buys (consumes) various goods and services. Moreover, not only the quantity but also the quality of consumption changes. Example: if the income is 11 thousand rubles, a person will buy food and clothing in the cheapest stores, if 200 thousand, then the stores and goods from them will be different. With very high incomes, this process stops (but there are very few people who have fulfilled all their desires, we know about them from the lists of the richest people in the world).