Anyways, I think the novelty to almost anyone here of the idea of decreasing job availability has worn off--as the author states, job and capital growth are decoupled. I don't think anyone would really argue that point.
There are, though, some questions that suggest themselves, a few of which have even already appeared in this thread:
* Is there some kind of morality involved in electing not to work, if the option is available but not required?
* Do we want to work towards establishing a society where leisure is the default, guaranteed state?
* If we do want to work towards that state, what then does it mean to live a good life?
* If we don't want to work towards that state, what is our justification for inflicting toil upon future generations?
* If we manage to eliminate all non-creative jobs (stocking, cooking, manufacturing, etc.), what do we do with all those folks? Is it reasonable to ask them to retrain?
Some of the great questions of life, while perhaps not unsolvable, are neatly sidestepped in one's pursuit of the lower levels of Maslowe's hierarchy; being unable to make rent has more than once gotten me out of a funk caused by a girl, for example.
If leisure becomes the default (which job trends would tend to suggest), it becomes a lot harder to punt on these existential issues--you don't get the shelter of the daily grind or shitty retail job to protect you.