Thought about it. All I gather is that there might be some slight disagreement in the exact distribution of promised future value, but that is minor detail. The people involved are still aligned generally, working towards a common goal.

But this confuses their individual interests with their behavior on a broader level. The house construction is completely irrelevant to the interests of the workers, but they still construct the house. I’m disagreeing with your derivation of interest from apparent behavior, because working on something is quite different from believing in it.