I remember his Computer pilot one but I don't think I have heard the one you refer to.
Two good ole boys went down to the Unemployment Office, and applied for benefits.
"What kind of work do you do?"
... "I'm a pilot."
"Oh, that's great! We can get you work right away!" Turns to second man. "And what do you do?"
--- "I'm a pulp wood cutter."
"Oh, too bad. If you were a pilot like your friend here, we could get you work, but I don't think we need any wood cutters."
--- "I don't think you understand. If I don't cut it, he won't be able to pile it."