While they may use price as a metric to try to guess if interdiction efforts are effective.... the tale is generally that interdiction efforts are not effective

While they may use price as a metric to try to guess if interdiction efforts are effective.... the tale is generally that interdiction efforts are not effective. Meanwhile, don't look to closely at what has happened with the cartels in Mexico. It's nothing more than "something must be done; this is something; this must be done." The wave of open drug use in the 1960s was pretty scary to a great many people.