Right, if you find yourself asking "Why has nobody else noticed this" you should always consider that the answer is "because it isn't there." But on the other hand, the idea that intentional behavior can remove correlation from causal relationships is important and deserves more thought than people give it. And since economics has something of a history of naming things for the wrong person, calling this "Friedman's Thermostat" and spreading it around might be a decent idea after all.