I lived out of a backpack for two months on a Pacific Crest Trail hike. I got comfortable with it and told myself that I had overcome my materialism, and could henceforth live happily without a lot of stuff and conveniences. Not so much. Now a couple of decades later, I've got a house and garage crammed with stuff. Yesterday I had a plumber here working on a leak, and this morning I have no running water, and here I…
You couldn't survive with just a backpack if other people "overcame their materialism" and didn't own all of the capital that allowed you to survive, like providing you your equipment, food, knowledge, and emergency rescue if it came to it. Criticizing "hedonism" is its own kind of hedonism, or in common parlance, a first world problem. It is a luxury that cannot be indulged by poor societies.
I don't think that's where we're headed, but I like imagining.