I believe that it is actually unhappiness and loneliness which are the drivers of consumerism and not the other way around. I believe that happy people are lazy and I think that is why western civilization has outstripped the others. I think, that since our social bonds have been destroyed, we work hard to try to seek happiness that the other civilizations already have. And then our civilization spreads, like a disease, infecting other civilizations and making them unhappy and hardworking as well.
I think that this is a relatively new phenomena, which occurred during the urbanization caused by the industrial revolution. Urbanization caused social bonds to be broken, and people became unhappy and hard working.
There is a super creepy tshirt from one startup I know, which has the text "the pyramids were not built by happy people". I've always wanted to ask them about what this means. But I've never had the nerve.
But it has always haunted me.