I don’t think anyone has ever argued that nobody would ever be productive without pay. The concern is that not enough people would choose to be productive if they didn’t have to.

There seems to be a correlation between doing productive things for fun and higher intelligence and education. There is also a strong correlation between higher intelligence and holding left-wing views. Hence, the people posting these types of memes think that everyone would do what they would (be productive for fun). But ask some more… average intelligence people, and you will find that they’ll tend to say if they could just chill and play video games or scroll TikTok all day, that’s all they would do.

Could we continue to feed people even if work was made optional? At our level of the tech tree, probably. But people don’t just want to be fed, they like having computers and video games and houses and running water, all of which take a stupendous amount of labour to create and maintain, and I’m just not convinced that we could subside off volunteer labour for any society bigger than a few hundred people (which, not coincidentally, also tends to be about the maximum size of a left-wing commune)