I'd like to read that random promotion paper. I wonder how high up they actually implemented this strategy, because the idea of the CEO just being the person that chosen at random more than anyone else is hilarious to me.
My mental model is that "promotion" is something that only happens to middle managers; board relevant seats are either appointed by the board or come from the good ole' boy network (which I do recognize is almost certainly worse than promoting a bad manager from within, who at least has existing relationships and business context)