The recent gas shortage in California is a superb illustration of the idea that if you don’t meddle with prices and just leave them alone, they will communicate to everyone how scarce a resource is. The natural and expected result is that people who want the resource can get it.
Prices worked
The recent gas crunch shows what happens when you let the market work. Prices spiked because of a supply crunch. People who didn’t really, really need gasoline held off on topping their tank. People who really, really did need gas could get it.
Two things prove this to me.