>But what does the return on capital look like in 2008 versus 1408? It is much, much higher. No it isn't. See table 2 here: http://74.125.47.132/search?q=cach

>But what does the return on capital look like in 2008 versus 1408? It is much, much higher. No it isn't. See table 2 here: http://74.125.47.132/search?q=cache:K7gncYlDrYQJ:www.econ.ucdavis.edu/faculty/gclark/papers/prod2002.pdf+%22return+on+capital%22+1400+1500&hl=en&ct=clnk&cd=2&gl=us&client=firefox-a http://74.125.47.132/search?q=cache:K7gncYlDrYQJ:www.econ.uc... Think of it this way: there is only so much wealth being produced in the world. Increasing lifespan by itself does not increase wealth (unless it increases the proportion of people who are of working age, but at most that would less than double it). So, if a large proportion of people are going to be equivalent to today's millionaires or billionaires, where's all this wealth going to come from?