The planning of AAR, rendezvous between tanker and receiver, achievement of contact and transfer of fuel requires considerable training and practise. Military aircraft refuel in designated AARAs or ALTREVs and at heights which are not particularly suitable for optimum cruise for civil airliners. Whilst refuelling the aircraft do not comply with MNPS requirements; the modification of aircraft to receive fuel adds structural weight and the process of AAR is not conducive to passenger comfort.
Routine AAR cannot be carried out unless both aircraft are visual with eachother prior to contact; this may also require FLIR or similar systems at night.
The paper is UTTER nonsense; whilst it may be convenient for Air Force One not to have to land (due to security issues) for extended periods, AAR for modern, fuel efficient civil aircraft is simply not needed.
The argument concerning fuel usage is a total fallacy - don't forget about the fuel which the tanker would have to burn!