In short, if you have a decision process (aka moral system) that can't resolve a particular problem that is strictly within its scope, you don't really have a moral system.
This seems to be to be a rephrasing and clarifying of your original claim, which I read as saying something like 'no true moral theory can allow moral conflicts'. But it's not yet an argument for this claim.
I'm suddenly concerned that we're arguing over a definition. It's very possible to construct a decision procedure that tells one how to decide some, but not all moral questions. It might be that this is the best a moral decision procedure can do. Is it clearer to avoid using the label "moral system" for such a decision procedure?
This is a distraction from my main point, which was that asserting our morality changes when our economic resources change is an atypical way of using the label "morality."
Here's the new thread for posting quotes, with the usual rules: