I don't think anyone could argue that lawyering and banking are unique skills, but they're damn highly compensated.
But she retorted how come we own a XYZ (XYZ being a clear marker) if we are not rich.
Some people who own a XYZ aren't rich. They're just up their eyeballs in debt.
Possibly true, but I don't teach my children to make that assumption. Instead we talk about values and choices and priorities. If my priority was to own a private plane I would make that happen, probably by doing a job I don't enjoy (everything I like pays peanuts) and sacrificing other things. The comparison in child terms can be as simple as having a cheap bike and a scooter or a really nice bike. Or hours of a parent away from home, ie: if we wanted to have xyz, Daddy would have to stay at work for an extra hour every day (spurious, because he's not hourly, but helps then understand the tradeoffs in spending).