When I was taking a tour in Sweden, they showed me a neighborhood in Stockholm (I forget the name) and said “that’s the apartments of the richest Swedes, but they don’t live there, all the richest Swedes live outside Sweden”.
Whereas, if all the richest Swedes live outside Sweden, that does tend to suggest that something made them move. (And doesn't suggest that the apartments they maintain in absentia are the richest apartments.) The default for Swedes is to live in Sweden.
Not really, at least not in the way I assume you are thinking. In a small country, of course someone who has international success if going to be wealthier than someone who only has domestic success a lot of the time.