I'm still blown away that there is no active ground monitoring of all flight wherever they may be in 2015. We still have planes "disappearing" because nobody knows where they are once they leave the ground.
So instead of having two pilots, why not have a computer monitoring system that actively monitors airplanes with only 1 pilot in it. Any weird actions by the pilot would trigger a warning allowing ground operators to override it. Boom, no more missing planes, or suicidal pilots.