For another perspective on the revolving door see Murray Rothbard’s monograph, Wall Street, Banks and American Foreign Policy.
“April 2015, Zero Hedge: “Gregg Berman will find a hospitable and well-paid position after spending 6 years defending the well-paying HFTs lobby. In all likelihood Berman will join the NY Fed’s shadow trading desk and the world’s most leveraged hedge fund, Citadel itself.”September 2016, WSJ: “Gregg Berman joins Citaldel.”
Source: The SEC’s Former Top “HFT Expert” Joins HFT Titan Citadel