If the market economy keeps producing new jobs fast enough to compensate for technology eliminating old ones, then I agree that we don't need to plan for mass unemployment at all.
But I want to stake out a position early on that if the market economy plus automation does not actually produce enough jobs for job-seekers in practice, then we should accept that mass employment was a historically contingent phenomenon that can be let go. It's not something that governments should try to keep shambling around in zombie form after the original economic rationale has died. (Bullshit jobs invented just to keep people provided with employment/income is one kind of bad response that I'm worried we'll see from protective governments. Another bad response, from neglectful governments, would be to ignore mass technological unemployment observed in practice, should it come to pass, because they're too wedded to a theory that enough new jobs will always arise in the private sector to offset jobs eliminated by automation.)
But I want to stake out a position early on that if the market economy plus automation does not actually produce enough jobs for job-seekers in practice, then we should accept that mass employment was a historically contingent phenomenon that can be let go. It's not something that governments should try to keep shambling around in zombie form after the original economic rationale has died. (Bullshit jobs invented just to keep people provided with employment/income is one kind of bad response that I'm worried we'll see from protective governments. Another bad response, from neglectful governments, would be to ignore mass technological unemployment observed in practice, should it come to pass, because they're too wedded to a theory that enough new jobs will always arise in the private sector to offset jobs eliminated by automation.)