By inverse, I mean reversing states of the world. If Alice and Bob have exactly equal wealth, then transferring $50 from Alice and giving it to Bob decreases to

By inverse, I mean reversing states of the world. If Alice and Bob have exactly equal wealth, then transferring $50 from Alice and giving it to Bob decreases total utility, because of the decreasing marginal utility of money. If Bob now has $100 more wealth than Alice, then transferring $50 from Bob to Alice increases total utility by the same amount. If by "take" you meant steal, then returning the stolen money is obviously also a good thing. If it's wrong to kill babies, then it's good to resuscitate ones that have died (assuming they're in the same state they would have been: no brain damage, etc.) If making one average child a genius is bad for the world, then making one genius child average must be good for the world. If you're a utilitarian, then the heuristic is basically a tautology: If moving from state A to state B decreases utility by X, then moving from state B to state A increases utility by the same amount.