Truth you seldom hear: "For some people, the main goal is to create as much wealth as they can". True, while planners say accumulate to fund wants/needs, some people just enjoy growing the pile for its own sake. Also the article says some rich people never bother to budget or track their spending. True, in my experience. Also the article mentions the goal of passing money to heirs. In which case the time horizon for an 85 year old easily be 50 years where as it is almost always assumed they have a short time horizon.

You can't take it with you and most rich people have created and earned more wealth than they will ever spend. Good for them, they gave for they took.