Billionaire Jeff Greene, who amassed a multibillion dollar fortune betting against subprime mortgage securities, says the U.S. faces a jobs crisis that will cause social unrest and radical politics.

“America’s lifestyle expectations are far too high and need to be adjusted so we have less things and a smaller, better existence,” Greene said in an interview Wednesday at the World Economic Forum in Davos, Switzerland. “We need to reinvent our whole system of life.”