While you're correct, the cumulative effect of lower class and middle class Americans on 3rd world peoples dwarfs that of the upper class. It takes a lot of time and resources to maintain the lifestyle of a single person working 40 hours at McDonald's.

His consumer products were made in 3rd world factories polluting their local environments and the coffee he's drinking was bought for less than a dollar a kilogram from a farmer destroying a priceless rainforest. When this impact is multiplied by three-hundred million, the effects are as dramatic as they are unsustainable.

...I try not to think about it. It's a conflict between guilt and gratitude.