Apparently that is not what the study concluded, they only found that everyone (rich and poor) underestimated the carbon footprint of the rich. Anyway, I still can't find this surprising. It's just obviously a complicated question. How much energy does it take to heat a home in a year? Or to transport a mango from Bolivia to Germany? Or to fly 1000km vs 10000km? This is what we have experts for, is it not?