Unemployment could be solved tomorrow if we banned large trucks and mandated all goods be transported in little 3wheel delivery vans like they have in little Italian towns. But that would be bad for society as the price of everything skyrocketed to cover the inefficient delivery. Or we could tear down power stations and make people carry buckets of water up a hill to run a hydro electric plant. These are absurd scenarios yet illustrate the reverse of the problem.
Technology happens, and it is generally good for humanity. Only a pessimist can looks at the enormous progress made in productivity through automation, and then confidently declare that from this point forwards, things can only get worse.
Entirely new businesses requiring lots of people are yet to be created. Detroit didn't happen 'just at the right time', Detroit happened precisely because it could - labor was freed up from producing the food supply, and disposable income increased because the cost of food dropped through automation.
It might be uncomfortable - change always is - but the alternatives are horrifying, like regulating new tech away and forcing people to keep those jobs. I for one never want someone metaphorically carrying a bucket of water up a hill for me so I can feel superior about makign sure they are still employed.