it may be way in the future or it may not ... but combination of advance robotic, AI, nano-Tech and BioTech can easily eliminate the need of 99.9% of the workforce. But, the journey and social unrest may be so bumpy that could push the human race backward ... or it may reach to 99.9% point in which there is really nothing for billions of people to do. In that case either a small number of people will rule the world and the rest will be in poverty and misery and pain; or it will be a golden age and all will focus more on science and spirituality - not religion but true spirituality to expand human consciousness ... for sure until then the road will be very bumpy.