On average, the praised, developed countries spend pretty much all of it, but even within those countries it makes a huge difference if you're wealthy or not.
We - or more precisely - the rich are overshooting. They would need a third Earth and it still wouldn't be sustainable. It's just telling if anybody comes along and blames "the people". What people? The peasants in Africa or wherever else who still live a sustainable life without a car and whatnot? Likely not.