In all your optimism, you're forgetting that the Earth will not be able to support that sort of population if humans average a 107 year lifespan. If nobody dies, the population will continue to grow, and the quality of life for everyone will decrease. We will have more pollution, more waste, and new diseases, and therefore the average lifespan will decrease. I highly doubt that a 107 year average lifespan is possible. That is assuming there will be no wide scale population control, which is inevitable, IMO. or a job market. I was suddenly thrilled with my part-time wage job when I read that post-graduation there were 1.5 million new people in the US job market yet no one is retiring at 62 1/2 anymore