They can impart cultural capital to their children, which is important for interacting with institutional aspects of higher education, healthcare, legal systems, job interviews… There’s a lot of assumptions about what people know, how they speak, how they make decisions… that serve as gatekeepers for admissions to elite educational options, professional schools, and good jobs. For instance, when I was interviewing for MD/PhD programs, one school had a dinner at the dean’s house. I assumed it was a gated neighborhood, as there was a huge building and lots of buildings the size of my parent’s house. I ended up in one of the servants’ houses; the big building I assumed was the clubhouse was the dean’s home. I was the only interviewee who didn’t know people had housing for their servants on huge properties like that one. It went downhill from there.

They can also avoid systems like public education with private schools or tutors. They can avoid the medical system with concierge medicine (quite cheap down in Miami, actually). They can opt out of higher education by providing jobs for their children upon completion of high school in case a child can’t make it into a decent college. They can avoid restrictions on commercial airlines by flying private. They can leverage connections to get into countries with a lot of visa restrictions (or buy a green card for residency in some countries).