Therapies after the SENS model will be mass-produced infusions (gene therapies, small molecule drugs, etc) coupled with some personalized stuff based on growing

Therapies after the SENS model will be mass-produced infusions (gene therapies, small molecule drugs, etc) coupled with some personalized stuff based on growing cells from a cell sample. It will be the same treatment for everyone, and subject to economies of scale that are the same as for today's drugs. Most will cost a few dollars per treatment after being in circulation for a few decades, the same as mass produced generic drugs today, and 30 years further into autologous stem cell therapies, those also will cost a lot less than the few thousand that they do now. People have done the modeling on what radical life span does to population growth. The answer is a lot less than you think. See: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3192186/ http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3192186/ "For example, we applied the cohort-component method of population projections to 2005 Swedish population for several scenarios of life extension and a fertility schedule observed in 2005. Even for very long 100-year projection horizon, with the most radical life extension scenario (assuming no aging at all after age 60), the total population increases by 22% only (from 9.1 to 11.0 million)." Most of the objections of the type that you voice can be answered by moving you to 1850 and making the same objections to the progress of medicine, and then seeing that they are obviously false concerns given where we are today. You could argue in 1920 that the same objections exist to building treatments that prevent people dying from heart disease: isn't it just for rich people, won't there be too many people if the old don't die on time, what would they do with all those extra years, isn't the present length of life just right, etc, etc.