I think that's broadly true, but just because you work somewhere as oppressive as IBM doesn't mean you don't long to breathe the free air. I like to imagine some of the contributors to the IBM songbook felt trapped in their day job and grabbed at that as the only available creative outlet, and they had their own magnum opus that they were going to publish just as soon as they felt safe enough to take the leap. I can't find any credits for the songs so maybe they did.