I don't think that's necessarily true. It's true for some people, mostly those that are rich because of their past work.

But I don't think it's true for people that didn't earn their money through work like those that inherited it or won the lottery. Society can be pretty dismissive of people in these categories.

I even think that we differentiate between people who are rich from work. Some people are seen has "having really earned it" while others "just got lucky." Shades of grey for sure, and people might disagree here but I think this is a real phenomenon that those who are seen as having done more valuable work are held in higher esteem.