Well, if two couldn't cope and the third didn't help either, why not just save the effort to employ them in the first place?
Yes, that is tongue in cheek. But apparently there are actually serious persons that come to that conclusion.
Ground based pilots are all the rage, and every terrorists wet dream. Don't even need to be on the same continent, simply hack into the link (and yes, every link is hackable) and do whatever you like. I seriously doubt it will happen anytime soon, but then, studies are mostly there to provide employment for some people that probably didn't find a job at a real company.