Yes, but a web platform that is specifically geared to setting that up. Something like hired.com but just for this.

Hmmm. By Devs. For Business. Buy a Dev.

Seriously, though, that's not a bad idea. I've seen similar startups that pre-interview a bunch of candidates (instead of farming them out for small jobs), so this is a different take to solve the same issue. Both sides get a chance to win, either way.