  Does this account resolve the circularity problem? Is there any non-moral motive of honest action? Some interpreters say yes, it is greed redirected, which removes the circle. But this presents two difficulties: first, our greed is not in fact best satisfied by just action in every case, and second, Hume denies that this motive is approved. Some interpret Hume as coping with the first difficulty by supposing that politicians and parents deceive us into thinking, falsely, that every individual just act advances the interests of the agent; or they claim that Hume himself mistakenly thought so, at least in the Treatise (see Baron, Haakonssen, and Gauthier). Others claim that Hume identifies a non-moral motive of honest action (albeit an artificial one) other than redirected greed, such as a disposition to treat the rules of justice as themselves reason-giving (Darwall) or having a policy of conforming to the rules of justice as a system (Garrett).  Still others say there is no non-moral motive of honest action, and Hume escapes from the circle by relaxing this ostensibly universal requirement on virtuous types of behavior, limiting it to the naturally virtuous kinds. These interpreters either claim that there is no particular motive needed to evoke approval for conformity to the rules of property — mere behavior is enough (Mackie) — or that we approve of a motivating form of the moral sentiment itself, the sense of duty (Cohon).