There's absolutely no zero sum assumption in my parable. The normal Smithian invisible hand (positive sum) stuff operates. Specialisation and trade add value. Nothing zero sum about it.
What DOES go beyond the usual (simple) Smithian world is the impact of risk on the correlation between effort, productivity, and resulting income. In the fairly deterministic world (Fruitopia), effort and productivity and (finally) income are quite clearly linked. In the more stochastic world (Oilivia), people put in effort, but it's only partially linked to the final outcomes.
What DOES go beyond the usual (simple) Smithian world is the impact of risk on the correlation between effort, productivity, and resulting income. In the fairly deterministic world (Fruitopia), effort and productivity and (finally) income are quite clearly linked. In the more stochastic world (Oilivia), people put in effort, but it's only partially linked to the final outcomes.