“The first counterargument that comes to mind relates to scarcity. Do the proponents of this argumentation really believe we are on the verge of eliminating scarcity?”
Just my two cents, but I don’t know how well this would work against them. They seem to be saying that there is so much new technology that workers are constantly being displaced and cannot move from job to job quickly enough because it takes time to develop new skills, etc.
So maybe this counterargument could be part of a larger counterargument, but I don’t think it works by itself. For example, you could point out the fact there’s a minimum wage, safety net, etc.