NamibFox - It ain't gonna happen!!! Apart from the technical aspect as described by Gengis, above, there is the security aspect. The prospect of ground control falling into the wrong hands does not bear thinking about, be it taken over military style or taken over using more powerful ground control systems.
(By the time all the system redundancy equipment is loaded on you may as well have pilots, they eat more, weigh less and cost less!).