IMO, the NFL is a macro-economic force in the US economy. Thus, the cause of the creation of the NFL draft would, IMO, be one significant factor in the NFL and the economy. Looking at the NFL's own claim as to how the NFL draft was started, they totally omit Koska and his negotiating tactic. Because, by definition, admitting the NFL did it to eliminate negotiating with players would essentially be a criminal activity.

Stan Koska was a football player for the U of MN in 1931. Graduated in 1934. No NFL draft then. All the NFL teams wanted him because he was so good. As no NFL draft then, each team made offers. Koska played one team against each other--and finally accepted a $5k annual salary with $500 signing bonus. Many players made $50/game, so HUGE money envy on every team. The next year, the NFL owners created the NFL draft--specifically to avoid the problems with their college/HS players when a star player could again do what Koska did.