2. It follows with the ruleset already in play, and we *Know* the universe is not inherantly lawful (In fact, there's far more chaos than law.)
Perhaps have there be a penalty to your save scaling with how bad the breach of contract was, but it should not be an impossibility.
Further, Wizards tell the laws of physics to shut up and sit down regularly from level one. If the Universe enforced these contracts, Spellcasters would laugh as Mundanes struggle.