The world only looks like it's moving towards post-scarcity because the resources consumed and waste produced have been nearly completely outsourced away, and the pangs of the labor issues created by automation are happening somewhere else.
Post-scarcity is not an issue of 'productivity' but of resource use. As Jevons paradox [0] points out the more efficiently we use resources the more of them we tend to use. Looking merely at productivity and efficiency without looking at resource use and waste production gives a wildly incomplete picture of "post-scarcity". What I see is that the world is increasingly separating into a small sub-population that is presented the illusion of post-scarcity and a another, growing, subset that is feeling the effects of scarcity required to maintain that illusion.
When I see data to support the argument that resource use and waste production are plummeting, then I'll believe in narratives about post-scarcity.