I live abroad and I'm not rich. I sometimes debate renouncing my US citizenship, but working remote in the US makes me well off here. If I had a local job making piles of money I might be more inclined to. My only complaint is that when I go to visit mom, I get endless grief from the immigration officials.
'People renouncing their citizenship are wealthy'
because I don't think poor people can afford to. That says nothing about whether poor people are more or less interested in doing so.