Morality as a Back-Up System: Hume's View?

IT IS SOMETIMES SUGGESTED THAT MORALITY IS NEEDED AS A GUIDE FOR ONE'S CONDUCT ONLY INSOFAR AS ONE'S "AFFECTIVE NETWORK" IS DEFICIENT. IF ONE ONLY CARED ABOUT "A", CARED FOR "B", FELT AVERSION TOWARDS "C" AS, IDEALLY, ONE SHOULD, MORAL PRINCIPLES WOULD BE SUPERFLUOUS. THIS PICTURE IS OFTEN THOUGHT TO BE HUME'S, AND TEXTUAL EVIDENCE SUPPORTS THAT CLAIM. BUT THERE IS TENSION IN HUME'S ETHICS BETWEEN THIS PICTURE AND A MORE KANTIAN VIEW THAT THE VERY GOOD DESIRES OF A VERY GOOD PERSON MAY NONETHELESS NEED TO BE TEMPERED OR CHECKED, AND I ARGUE THAT HUME IS MORE CLOSELY ALIGNED WITH THE LATTER VIEW.