Why might some wealthy people not like spending their money, either on themselves or on others?

That's an interesting one - I think some wealthy people might avoid spending their money because they've built a habit of saving and being cautious. It's not just about having money; it's about the mindset they've developed over time. For example, my high school math teacher, Mr. Wang, always talked about how he saved diligently, even after he became quite successful. He said it was more about feeling secure than being stingy. At the same time, they might worry about how others perceive them if they spend too much. In Shanghai, I've noticed that some people with wealth tend to avoid flashy lifestyles because they don't want to draw attention or seem wasteful. So, it's often a mix of practicality and social awareness.