Who originated the quote, "if you're so smart, how come you're not rich?" Flannery O'Connor? D.H. Lawrence?

Question

I seem to remember it was in a novel, and some smart aleck kid asked the question, sometime between the 1890s and 1930s, I believe. Someone online said they were paraphrasing Lawrence from his short story, "Rocking Horse Winner."

Answer 1

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It was in a story by Eudora Welty, "Petrified Man." Wealth is all important to all of the characters in the story. If I'm so smart, how come I'm not rich.

Chances are Welty did not originate the phrase. It sounds like the kind of phrase that would have been current in US speech. But I don't know that for a fact.