Get to the Root. Will there even be "public toilets" in a Resource Based Natural Law Gifting Economy? What is a toilet in this model. Might not even be called toilet. Much of what is thought of as waste in the current economy would be a resource to be recycled and accounted for in a RBE. Not a public toilet but a place to recycle resources into energy/food/water systems. Those systems are not wants in this system, they are needs, for everyone.
It's all connected to the system. The resources will be collected and processed as effectively as can be achieved. There will be no waste, waste is food. Many processes can be automated, more processes will evolve. If a toilet needs to be cleaned, I will clean it myself if I can't find someone to help me, just as I might pick up something off the street today to be recycled.
If this were a Spaceship,, and it is, I would be responsible, along with the rest of the passengers, for all the critical systems.. I would know everything i could about them and how they work. I may have been involved with the engineering of this Resource Recycle System,,(RRS?)