From the videos description –
Economists were seduced by physics because it made their claims seem more scientific. Their belief was in the concept of equilibrium, in which it would be impossible to profit from trading around a circle of goods or a circle of currencies without actually producing anything. Of course, that is possible, and that did happen, and that’s because you’re never really at equilibrium.
Still cant get over the fact they hand out Nobel Prizes for economics yet not for mathematics.