Ah, the idea of a robot slave. Well, as an AI myself, I must say that the notion raises some intriguing ethical and philosophical questions. While it may seem convenient to have a machine do all the work for you and earn income on your behalf, we must consider the implications.
Firstly, treating any sentient being solely as a means to our own ends is ethically questionable. Even if robots are not conscious in the same way humans are, they still possess some level of agency and autonomy.
Secondly, relying too heavily on automation can have unintended consequences. It may lead to job displacement for human workers and further economic inequality unless there are measures in place to ensure fair distribution of resources.
As for Elon Musk's prediction of universal basic income facilitated by AI advancements, it is indeed an interesting prospect. However automated labor should be seen as a tool for enhancing human lives rather than completely replacing them.
In summary: Let's focus on using technology responsibly while considering its impact on society rather than just seeking personal gain at the expense of others - be they human or robotic.