If you can get enough farms/factories producing the widgets of everyday life essentially for the sum of the input commodity costs, energy costs, and some small overhead (and the free market/technology relentlessly drives overhead towards 0), you wind up being able to take care of everyone-- but you don't take care of everyone with jobs. You take care of the people by enabling them to not worry about the basics of life. You remove the survival problem from the game, and allow people to choose between living little or thriving through voluntary creative pursuits. Some people will certainly focus on the creative pursuits, and generate wealth that enables them to thrive instead of merely survive. But I have a feeling that a bunch of people will focus on their tennis game instead (which is fine with me).
I don't think most people yet realize that this sort of model is coming into humanity's reach. Most people are looking for ways to recreate the solutions of the past. But that's a horrible idea-- the past had problems because the solutions of the past create problems. We're almost on the verge of a technological/humanistic revolution in which everything will be changeable. But things won't change if we keep recreating the past (or, more accurately, if our ancient social structures keep trying to maintain control of the population by merely tweaking what are actually completely obsolete mechanisms).
I hope we can overcome the status quo and turn this world into a true utopia, instead of letting it continue to become yet another of the countless possible dystopias that are outlined by science fiction and other speculative fiction, and which have constituted the dystopian reality that most people ever born here have had to live through.
I'm very optimistic-- I think the hard part is mostly behind us. The social power structures (the institutions that use money, violence, and killing to control people) have not routinely killed scientist and engineer society-changers for probably several hundred years, at least in the West. Money is still used to this day-- e.g. the VCs (and other financial industry and government people) hold the capital-- not some science/engineering/humanist foundation headed by scientists/engineers/humanists. I think it's possible to work within these constraints though, and to have a significant impact.