I think the biggest problem with your proposal is that it's hard to do a startup with founders who don't know each other well. The founders and early employees will face long hours, stress, and possibly financial woes. Some background history and an interview aren't enough to ensure that someone won't flake. The best co-founders are friends who have worked together previously. As Paul Graham says:

And the relationship between the founders has to be strong. They must genuinely like one another, and work well together. Startups do to the relationship between the founders what a dog does to a sock: if it can be pulled apart, it will be.