I have always found the term post scarcity problematic. The common definition of scarcity defines it as, loosely speaking: insufficient supply to meet demand. If we take this definition at face value then we have achieved post scarcity the moment nobody demands anything. Therefore, we could achieve post scarcity simply by taking happy pills and making ourselves artificially satisfied. Alternately, we might never achieve post scarcity if some cosmic beings somewhere in the universe still want the same rivalrous good, such as to be “undisputed king of the Milky Way”.
Thus when people talk of post scarcity what they often mean is something more like post material scarcity. This isn’t necessarily a great term—it’s added length means it doesn’t roll off the tongue with the same ease—but it is clearer in intent. In the short term, what we should strive for is not necessarily the end of all scarcity, but rather the creation of a world where all of people’s basic material needs are met.
This of course raises the question of what constitutes “basic material needs”. I would propose that the bottom two levels of Maslow’s hierarchy—physiological and safety needs—might be a sufficient starting point, with the added qualification that ideally no one ought to be coerced into work they don’t want to be doing. This landmark alone would constitute a pretty big change to the human condition.