Conservatives love to belittle federal regulations — especially the ones designed to keep our air clean, our water drinkable, our workplaces safe, and our financial markets stable. Conservatives, of course, don’t oppose any of those things. They just think unregulated markets, left on their own, will keep bad things from happening. Customers will see when a dishonest company is putting Americans at risk; and when they do, they will unleash their fury and incinerate it. Unbridled capitalism is the world’s largest self-cleaning oven. Last week’s news from the automotive industry should lay that argument to rest.