That’s not necessary for all results. It would be relevant to some—e.g. monetary economics (obviously), budgets constraints, and anything where the role of money as an incentive is crucial. But it’s not needed for e.g. much of price theory, which is the main sort of application I imagine. Indeed, if we look at Glen Weyl’s definition of price theory, it immediately sounds like it would be applicable to many problems in biology.
(Also, I suspect one could work around the absence of a budget constraint by directly observing the consumption function.)
That’s not necessary for all results. It would be relevant to some—e.g. monetary economics (obviously), budgets constraints, and anything where the role of money as an incentive is crucial. But it’s not needed for e.g. much of price theory, which is the main sort of application I imagine. Indeed, if we look at Glen Weyl’s definition of price theory, it immediately sounds like it would be applicable to many problems in biology.
(Also, I suspect one could work around the absence of a budget constraint by directly observing the consumption function.)