In the process, I got to know some “rich kids” (Catholic and Jewish, respectively). Children do a wonderful job of betraying the emotional sensibilities of their parents. Again, they were spotty. Among them were some truly fine people: gracious, polite, studious... what one would hope for among an “upper class.” Yet the majority were spoiled, vindictive, bratty, shallow, and really not that smart.
That is certainly more true now (compared to over the bulk of the last century or so) because Internet wealth can be virtually instantaneous. It took Rockefeller decades to build his company.