Hate to bust your attempt to bust my bubble but you are wrong. The party doesn't pick the VP, the candidate picks their running mate, it has always been the way since they started combining the VP and Presidential ticket. You going to tell me that someone is going to let a bunch of yahoos pick their VP for them? BS. McCain picked Palin, Bozo picked Biden.
It is the party which approves both nominees no matter who suggested the VP that is simply irrelevant. It is a party decision which makes it official. Besides there is nothing which prevents an unqualified Presidential candidate from suggesting the VP. The constitution is silent as regards such matters.