Because working in government is what Goldman people do. Pesident-elect Donald Trump will reportedly name (((Gary Cohn))), the longtime chief operating officer at Goldman Sachs, the director of the National Economic Council. If you’re keeping count, that would be another Goldman alum in Trump’s orbit, in addition to: former Goldman banker (and former Breitbart honcho) Steve Bannon, set to be a key White House adviser; former Goldman partner-turned-bubble-surfer Steven Mnuchin, who will head the treasury; and former Goldman banker Anthony Scaramucci, now a key transition adviser. Is it a betrayal to hire men like Cohn, who the last time I saw in person was fist-bumping a bartender at Davos? After all, Trump lambasted Hillary Clinton for giving highly compensated speeches to the investment bank…