Considering a post-scarcity world, it is not difficult to imagine a pseudo-utopia with the way technology is going. Using the example of Manna, imagine the ability to plug into some perfect VR world that looks and feels just like reality. Why would anyone want to "compete" in that scenario?
Already today, human beings would rather stay at home and consume various forms of media (tv, games, etc..) than go out and "compete." Humans typically value security over a marginal gain in luxury. Even the risk-takers among us err closer to the security-side of this spectrum on the whole.
I think those in this thread that worry that humans will always have an innate desire to one-up their brethren are worrying about nothing or some close approximation to nothing.