From economist Deirdre McCloskey’s “If You’re So Smart: The Narrative of Economic Expertise” (1990):
The expert as expert, a bookish sort consulting what is already known, cannot by his nature learn anything new, because then he wouldn’t be an expert. He would be an entrepreneur, a statesman, or an Artist with a capital A. The expert critic can make these non-expert entrepreneurs more wise, perhaps, by telling them about the past. But he must settle for low wages. Smartness of the expert’s sort cannot proceed to riches.