Resources will always be scarce, and honestly I don't know what people would do or how they would be motivated in a world where they can always have anything they want or need.
True post-scarcity would mean anyone could have their own private plane, spaceship, etc. That couldn’t happen without some kind of speculative singularity scenario where we get Mr. Fusion and benevolent superintelligent AI or something. Star Trek levels of post-scarcity are sci-fi.