All presidential appointees need to be approved by the Senate who have the power to "advise and consent". And it wasn't Citibank who did the selecting. It was Michael Froman of Citigroup who advised the transition team who would be good candidates. Froman was a friend of Obama from their days at Harvard Law School and had both worked together at the Harvard Law Review. He had been advising Obama on policy since 2004.

You know, everyone has a life outside of politics. I understand Trump did things with hotels and golf courses. Froman had worked in the Bill Clinton administration, then went to work for Citigroup after 2001. There's nothing sinister about his recommendations. And it's wrong to say it was "Citibank" who made the choices. 

Interestingly, Trump has had trouble finding good people.. And he's picking a lot of people who are billionaires. Billionaires who don't actually seem to match the skill sets for the departments they've been appointed to. Who gave Trump his list?