Workless societies depend on voluntarism so there is no need to precisely define value. For instance, who decided that creating Linux was valuable use of Linus Torvalds time? In situations where you really have to define value, democratic votes is fairer than "letting the market" (i.e rich people) decide.

> Workless societies depend on voluntarism

This presents a workless society as a real thing, rather than a hypothetical. I might be wrong, but I’m not aware of any workless society (apart from hunter gatherer tribes and history). If you have examples of a society that functions fully without work, then please share, I’d be interested to see how you solve volunteering for unpleasant or undesirable tasks that no-one wants.

They have existed on small scales. Everything from hippie communies to Christian monasteries to Israeli kibbutzim. The reason tasks are undesirable is because the tasks are detached from people's lives. Raising kids is certainly "objectively" undesirable, yet people do it for free and at great costs. Why? Because it's meaningful.

Kibbutzim is an interesting one. My uncle lived on one for a while, he definitely describes them ‘working’ alongside each other.

Work is a severely overloaded word. I'm using the Marxist definition which I described in another comment.