Well, here's a somewhat relevant quote from someone who did win a Nobel Prize in economics:

"Most economic fallacies derive from the tendency to assume that there is a fixed pie, that one party can gain only at the expense of another." ~Milton Friedman

Sounds familiar, no? And while you might not be able to find someone who says that economics is a zero sum game, you can't throw a rock in any direction without hitting someone who is pushing an agenda or ideology that acts as if it is.