That would be income adjusted for PPP, similar to adjusted for inflation. Still not quite what the OP wants, I suspect. I think we means "how many people earn

That would be income adjusted for PPP, similar to adjusted for inflation. Still not quite what the OP wants, I suspect. I think we means "how many people earn enough to live decently, but that's hard. I might be a 20 to student in Paris living on €1,200, consider myself fairly well off. House-sharing, couch surfing holidays, €1 drinks every Tuesday ..student living. A 40 yo might consider this a poverty income. "Getting by" generally seems objective enough at first glance (rent on basic accomodation, etc), but culture and expectations play a big role. Also expectations about the future and stuff. Basically , it's complicated. ..and outside the scope of an "measure," imo. I think it's more useful to construct a picture from several simpler, more objective sources. Add up "living costs" to get your "minimum decent living' and then see how many people/households/workers have that much income. It's never gonna be a real measure though, because "decent living" depends on circumstances.