It's a nice idea, but it wouldn't make any sense. Big institutions are arranged a certain way because of the incentives. You're not going to change the incentives because the people at the top fundamentally don't understand the way R&D works. Further, big organizations tend to reward a track record of successes no matter how small, rather than rewarding herculean efforts that only succeed halfway (or fail). The culture is generally anathema to taking risk.
Because the organizations are the way they are, nothing will change unless you change management to the highest ranks and empower people at all levels to make things better. Sadly that rarely happens in big companies; people manage to claw their way up and they're not going to risk that job, power or prestige unless it's a sure thing. Which R&D never is.