I suspect that's because a lot of us finance and econ profs like him.
I went to grad school in Boston, so I know first hand that he is highly regarded in the Harvard and MIT econ and finance deparments (which lean republican, BTW, to all you Romney haters). His head econ advisor for his presidential campaign is in the Harvard econ deparment, and he had several MIT people advising him while governor.
Not surprising. Eric Kriss served as Mitt's Secretary of Administration and Finance in Massachusetts. His uncle was Milton Friedman, the Nobel economist -- and fiscal conservative hero.
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"The unfettered free market has been the most radically destructive force in American life in the last generation."
-- Hillary Clinton on C-Span in 1996 stating her troubles with the free market
"What most people really object to when they object to a free market is that it is so hard for them to shape it to their own will. The market gives people what the people want instead of what other people think they ought to want. At the bottom of many criticisms of the market economy is really lack of belief in freedom itself."
-- Milton Friedman, Wall Street Journal, May 18, 1961