It would force the organization to its knees in my opinion. Unions for work in showbiz are ridiculous in that they restrict people to members of a specific union; e.g. All adjustments to an actor'a appearance must be done by the appropriate member of the cast, insofar as a sound guy couldn't brush a hair off of the shoulder of an actor.
Imagine the same craziness applied to which kinds of code you would be able to work on. I don't see the need for crippling the actions that enable our employers from innovating quickly for what amounts to more beaurecracy.