Ben’s a good man and would be a fine addition to the Admin. But he’s also a top notch surgeon and maybe, considering that gift, he might want to stay active in his medical calling instead.
Carson has stated that he is through with being a surgeon.
He said in an interview some time ago that he thought it
was his time to leave the field. He lives now in Florida
and flies around giving speeches (before taking part in the
campaign) for money. He lives in a great place in I think
West Palm Beach and doesn't want to return
to the stressful neurosurgery routine.
In other words, he has a nice stress-free prosperous retirement and he
doesn't want a boring nine to five desk job in Washington DC.