In simple terms of cost effectiveness- manned combat vehicles will always be more expensive then tele-presence operated drones. In simple terms- training a combat pilot and outfitting him with a vehicle costs nearly double what you can produce using drone systems. The newest american fighter system the F-22 raptor. Is a Multi-million dollar machine. Before you factor in the training expense of the individual pilots. Effective aerial combat drone systems can be produced for a few hundred thousand dollars. Effectively dollar for dollar you can get approx. a ten to one ratio. With this ratio a manned fighter is simply outmatched. when you factor in the additional loss of human life versus the loss of a machine it becomes obvious that drone systems surpass the manned combat vehicle. In other words; If I have ten combat fighters with pilots fighting ten drones Even if I lose those drones I still win because I dont have to replace each pilot. My drone pilots can simply take control of another drone and get right back into the fight. A manned vehicle pilot is, if not injured or dead, out of the fight till he or she can be recovered. And I havent even gotten into the slaving of multiple drones to one operator.