If I had limitless funds I would definitely want to contribute back to the world. To just be entertained and shop would create a hollow existence. If I had children, I would want to be involved in raising them and not always dressing up and going to functions. I love to teach and create to communicate meaning and to increase empathy and self worth in other individuals. I want my society and loved ones to be healthy in their selves and interactions. Achieving these results requires effort and work. Knowing that my own existence has made the existence of others better would help me to know that my life had meaning, and that the end of my existence is not the end of my contribution. Through love and contribution we become part of our reality and alleviate the underlying isolation of our existence.
Whether or not a person is paid for such a thing is irrelevant.