Its lucky that changing legislation in aviation is glacial. I can certainly see single pilot ops returning to civilian aviation in a demonstrably and statistically safe way. All you need is an aircraft which is essentially a UAV which also carries a pilot. That way you have the redundancy of a two pilot operation but you have statistical redundancy should the UAV fail. And how hard would it really be to convince the public? I'd imagine it would take cheaper fares and about a week. So the original question is very sensible - current legislation makes it an unworkable suggestion but in the future? who knows..