… is from page 11 of my late Nobel-laureate colleague Jim Buchanan’s January 10th, 1997, lecture, “Has Economics Lost Its Way?” (original emphasis):
Only if individuals are free to interact, one with another, can they achieve their own values. Informed with this elementary principle, the economist can “earn her keep” many times over by forestalling, even in a limited way, the effectiveness of the interest-motivated arguments of politicians, often advanced through easily-refutable fallacies.