In economic theory, we learn that earning money is good and working is undesirable. Many people dream of having a very high income so they don't have to work and just enjoy life. However, we see in real life that there are thousands of people who have a very high income, perhaps more than they can spend in a lifetime, and yet, they still work harder than most people. Warren Buffet, Bill Gates, and Elon Musk are just few among others to name. How does this fit (or does not fit) in the economics context