The issue is personally clearer with friends: most of us have friends (or ex friends) who are comparatively much better off or much worse off. It leads to weird strains, especially if the friendship is between male and female.
Different people have different norms about money. It becomes especially fraught if there is any sort of status contest going on.
I can see why people tend to group their friendships by their income (not just due to selection effects). As you get wealthier it is just more effortless to hang out with other people with similar means. I doing think it is just a status issue (although presumably that has song influence too).
The article talks about wealth differences, but it would have been more interesting to also look at what happens with large status differences (artist musician sportsperson etc).
Ages ago I used work on the code for wikipedia's infoboxes and to make testing less boring, had a list thousands of famous people. The test script would pick one randomly to populate the info box. After many months of staring at the spouse list of famous people, it felt like literally all of them had been married multiple times. Maybe its just natural and affordable for people who are doing well. And maybe successful women just need to target younger men who communicate their issues better, and aren't carrying as much older belief baggage.
In my limited experience, successful women find it difficult to find a partner with similar success:
1. Many men struggle to deal with a women that is doing better than they are (see article)
2. Successful men are extremely sought after, so there are hurdles for a successful women that is otherwise an average women to "compete" for a successful man.
3. There's some fairly epic horribleness from others about the issue (I find your comment unpleasant). Society can have some mean stereotypes about successful women - even ignoring jealousy.
Different people have different norms about money. It becomes especially fraught if there is any sort of status contest going on.
I can see why people tend to group their friendships by their income (not just due to selection effects). As you get wealthier it is just more effortless to hang out with other people with similar means. I doing think it is just a status issue (although presumably that has song influence too).
The article talks about wealth differences, but it would have been more interesting to also look at what happens with large status differences (artist musician sportsperson etc).
https://archive.ph/vZsiX