Well I guess there are many areas that they could cut redundancy. Why not scrap the second engine on twins? After all, today's engines don't fail, right?
You would make a much better argument if you could give logical reasons to dispute the redundancy of a pilot by replacing one with automation and or a ground based emergency pilot to operate the aircraft as a UAV.
There is no redundant replacement that is economic out there for an engine other than another engine. If pilots could operate less with less expence, greater efficiency and less maintenance, I am sure this would be the logical path for the bean counters to persue.