Good-hearted people want to cure hunger, ignorance, and other human deficits. Many see the cure in taking from the group of “haves” and giving to the “have-nots.” Along with the injustice of the transfer itself, libertarians like to point out the backward incentives that generous, systematic giving creates. Poverty and ignorance becomes a low-end, but survivable, mode of living. It’s not really a surprise that these problems respond to subsidy by becoming intractable.
That’s simple math to people who understand incentives, so it shouldn’t be hard to recognize incentive structures and their warping in other areas. Take federalism.
When state officials go wrong, good-hearted, economically-minded people want to cure their deficits. Many see the cure in removing power from the state level to the federal through preemption.
One can “fix” bad state regulation by replacing it with a less-bad, nationally uniform rule. But doing so frees state officials from responsibility. The subsidy makes carelessness a low-end, but survivable mode of governing.