Stilton, bad idea as your policy would lead to many delays and cancelations
I see your point though, but my company doesn't mind so much to push back, and even start engines simultaneously without headset communication.
Mustafa, what lights
would you flash and to whom when you start the second or the third engine on taxi out? Or when you are parked remotely and have to start without ground support? Again, you have a point, but...
Regarding the safety of a one man push, I wonder if the tugs have an equivalent of the 'dead man's stick' I am told you find in trains.