Don't you think that creating a pilotless surface vessel would be easier? Why is no one looking into that?
I have extensive experience with unmanned aircraft (policy) in the Department of Defense, and liaison with the FAA, and I can assure you, this is not even close to happening.
Ask yourself why we don't have single engine freighters.
This is a fantasy of cargo operators who don't view pilots as human beings, and begrudge them every nickel they pay them.