Kevin Williamson at National Review addresses the zero sum thinking in The New New Malthusians:
The super-neo-reverse Malthusians mainly are concerned with a different commodity: labor. We are getting so good at making things, they say, that there simply won’t be enough jobs in the future. Which is to say, they believe that we are going to make ourselves poor through abundance.
It may be the case that nothing in this world is truly unlimited, but one thing that certainly appears to be close to unlimited is the capacity and variety of human desire. What do we want? More. More and better material things, bigger and broader experiences, more extravagant and rarefied leisure, more more. If I were a betting man, I’d bet on our finding some use for all that energy that’s supposed to be sitting around doing nothing, and for all that labor, too.
What will those jobs look like? Nobody knows, any more than the Reverend Malthus could know what a modern farm would look like. In the 1950s, my father was employed as a butcher. If you could go back in time and explain to him that in 2016 there would be such a thing as a “celebrity butcher,” or that the smart and chic young things in Brooklyn and Los Angeles would spend their generous allowances on a chance to spend an evening with one, he’d have thought you insane. He probably still thinks that’s insane. But in the 21st century, we have a major industry based on the odd fact that men in white-collar jobs like to go home at night and watch men do blue-collar jobs, in automotive shops and pawn brokerages.