He&#x27;s pretty clearly intentionally only focusing on labor income.<p>It seems to be a rehash of this: <a href="http:&#x2F;&#x2F;www.aei.org&#x2F;publication&#x2F;the-terrible-economic-burden-of-occupational-licensing&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.aei.org&#x2F;publication&#x2F;the-terrible-economic-burden-...</a>