There will always be a pilot...the only difference is he or she may not be in the aircraft. Look at the USAF Global Hawk high altitude drone. Launch team in theater, mission control team in the US, recovery team. Data link hand off, crew swaps etc. You will still have requirements for training, currency, crew rest, crew day, etc etc. These pilots will want to be paid for their services just like the ones who actually go along for the ride. Add in all the techies for data links and satellite comm requirements and you are right back where you started.