>I think the problem is that a rational person (in our current definition) is incentivized to spend most of the available income/wealth during his/her lifetime

>I think the problem is that a rational person (in our current definition) is incentivized to spend most of the available income/wealth during his/her lifetime This is not necessarily a problem; there's no objective way to weigh up the satisfaction of somebody alive now against the satisfaction of some hypothetical person alive in future. And attempting to do so introduces some interesting questions, e.g. if we seek to maximise the satisfaction of future people, as individuals should we try to have as many children as possible? Because more people means more overall satisfaction.