You can still have competition and create competitive forces that drive and motivate people, they don't have to be tightly coupled to fundamental energy and mat

You can still have competition and create competitive forces that drive and motivate people, they don't have to be tightly coupled to fundamental energy and material resources needed for survival, or, they can follow classic models that assume necessary baselines for enjoyable survival levels for everyone and then provide luxury allocations for competitive successes. There's all sorts of options out there instead of directly mirroring natural selection in abstract human created systems.