Well, I meet the criteria. I make good money and am hung like a chipmunk.* My wife also makes good money. She's not hung, either.
Assuming the results are factual and not a spoof, it begs the question, "Why? What causes financial success to be inversely related to penis size?" An outgrowth of small penis compensation? But why not in other areas?
I played sports most my life, and, on average, most jocks fell within the normal size spectrum. The only exception would seem to be bodybuilding, and I personally have never seen that to be the case, at least overall.
* I can also confirm the related finding, that "8 inches was the optimal size for making a woman climax." I'm admittedly a rotten lay, at least as far as PIV sex. On the other hand, I am great at picking up women!