You're making a lot of assumptions that have no basis. Art is not work anymore than is sex. Either will meet the overly broad definition you pose of work.
The owners of robots presently are more wealthy than those that don't own robots. Unless the situation changes, they're going to remain so, and golden escalators are an actual thing that exists today. I am arguing that in your model those capitalists will be fabulously wealthy 1%'s, because they are right now.
What I am also saying is that as automation deprives the 99% of income when the 1% own the robots, the 99% are going to take the robots away. This will happen unless the 1% begin to share that wealth more equitably, which is why UBI.
There are no examples of a post market economy because automation hasn't made it yet. Do you suppose that automation isn't going to replace human labor?
Let me be the first to welcome our Robot Overlords! but srsly, sentience has nothing to do with it. Greed and fairness do, and once people see that automation provides for all human needs not dependent on intercourse, they will make the system fair.
Fair will be equal, and since robots aren't paid, money won't be needed. People won't need money for anything, because robots don't need to be paid to do work. Markets will be irrelevant.
But that's besides the point. You completely ignore history in stating that voluntarily entering into a relationship that features coercion isn't possible. That statement has no relation to reality.
The quote I posted from the Declaration of Independence says so, and provides reasons why. You just say otherwise, without any reason at all. You claim we only have the right to oppose oppression. As far as I know, you are the only person that says so, and you have no basis for saying all the other rights we do possess don't exist.
I have a right to prove what I'm saying is true, and a responsibility to prove it if I'm saying it.
You do the same.
You can't universalize any other so-called right. It doesn't work that way without imposing on others without their permission (actual coercion). You also can't enter a voluntary, consensual contract with another person if you're coerced, so by definition, coercion is not possible in a voluntary, consensual contract. Otherwise, it ceases to be voluntary. Logically you cannot enter into a voluntary exchange with someone if you are coerced, and it cannot remain voluntary if you are coerced to do something outside of the bounds of the exchange. I've already said this before, but there. I've demonstrated why this is the case. Coercion makes consent impossible, and consent is a prerequisite for voluntary interaction.
All you have is conjecture. Money is a simplification of barter. No amount of automation is going to solve the economic calculation problem. There is no post-scarcity economy or resource-based economy. That's incongruent with reality.
While I respect your ability to bloviate, I am continually reminded while reading what you say of specific examples that totally contradict it.
There really is no such thing as coercion. Nor is there any such thing as freedom. Everything is a myth, and so I'm just going to believe I don't need to listen to you pontificate anymore.
Good day.
Whatever. Enjoy your nihilism.