We are unhappy BECAUSE it's a utopia, and our brains evolved in a landscape that was ALWAYS trying to kill us. Like an immune system in an overly clean environment starts attacking inert things and creates allergies, our minds have created threats and focused on "relative" scarcity over actual scarcity. Instead of "How am I going to get enough calories to survive this week?" it's "Why does that guy get to be in a private jet and I have to fly coach?"