Because a career as a community organizer makes him such an expert on business and stuff.
(whitehouse.gov) — “… If we make America the best place to do business, businesses should make their mark in America. They should set up shop here, and hire our workers, and pay decent wages, and invest in the future of this nation. That’s their obligation. And that’s the message I’ll be bringing to American business leaders at the Chamber of Commerce on Monday — that government and businesses have mutual responsibilities; and that if we fulfill these obligations together, it benefits us all. Our workers will succeed. Our nation will prosper. And America will win the future in this century just like we did in the last.”