I know Dan Cooper’s “grudge” - he had $200,000 less than he desired. The whole lay-offs thing, the “grudge” is too deeply read. It was a financially motivated crime.
Darren had a lady on his podcast saying that he did it to show it could be done. If so, why not ask for a Mickey Mantle Baseball Card and four parachutes. Or a Monet and four parachutes. Both easier to transport. The guy was a greedy MF who wanted money.
I like the whole CIA/Interpen Goon angle. I really do, but it’s what makes a better story and fiction can be more enjoyable than the fact that a lone middle aged man wanted money, got it, and was so unremarkable that he had nobody to tell or wasn’t missed if he slammed into the ground or took a swim.