"Have you forgotten that billionaires have bunkers?"
Not many would call living in a bunker "thriving".
I wouldn't.
"Thrive is relative... significant human suffering"
You seem to imply that I don't think significant human suffering is thriving (which is true).
And if you think that we can still use words even if they aren't nailed down to laboratory precision, then I think it's fair to "significant human suffering" is hardly "thriving."