Some of the happiest people I've met in my life have everything by North American standards. Material things are tools for happiness, not happiness itself.
We all go to work for 40 hours a week so that we don't have to live in a tent, cook on a travel stove, and hunt/grow our own food, which suggests a very day-by-day, unstable lifestyle. If that's what makes you happy that's great, but I don't think it's fair to call it "consumerism" when really it's just reaping the benefits of technological advancements. Many people would rather work 40 hour workweeks for (essentially) guaranteed food, water, shelter, and leftover purchasing power, which I think is perfectly reasonable.