I'm not sure that's even possible, what you're talking about is complete and total self motivation and I'm not sure it's possible or even attainable in the first place.
As humans we depend on each other for everything, there isn't a single human that doesn't depend on another human in one way or another for something, to achieve complete and absolute self motivation would be a similar feat to achieving individual independence for everything.
Our motivations come from different things, it could be personal gain, love, power, money etc infact, even motivational speakers are motivated to do what they do. As human beings motivating each other is part of what makes us human. I don't think all of humanity being self motivated and doing away with motivational speakers and writers is possible.
I hope this helps.