What economists have taken seriously the premise that AI will be able to do any job a human can more efficiently and fully thought through it's implications? i.e. a society where (human) labor is unnecessary to create goods/provide services and only capital and natural resources are required. The capabilities that some computer scientists think AI will soon have would imply that. The ones that have seriously considered it that I know are Hanson and Cowen; it definitely feels understudied.