It's worse than that. We've come around (amazingly) to a position where we actually require corporations to be amoral. If a corporation acts in a way that doesn't attempt to maximize profit within the law, they can be held liable by their shareholders. This systematically ensures that corporations will act in the most amoral fashion possible.

Our constitution is not an attempt to codify laws, but rather an attempt to codify the exact same principles I was talking about. In large part, so that all laws can be evaluated against those nigh-unchanging principles.