I wanted to take a poll among LW folk since this question I had didn't seem to have a straight forward utilitarian answer. Please correct my impression, if wrong.
A government has a limited budget of USD $10 Billion, which it will award in 10 years with which it plans to encourage aging stoppage/reversal. It plans to do this in a relatively fair manner by announcing a competition in which various therapies will be evaluated.
The methodology is simple. The photographs of people who have undertaken the therapy and a control group are shown to people and they evaluate whether this person looks B years old or B + I years old. Similar checks are done with the blood and various other health checkups. These are evaluated by doctors, who answer the same question. Does this look like the report of one who is B or B+ I years old. All possible blindings are done correctly.
B is the base year against which the therapy will be evaluated and I is the increment of years for which the therapy should work.
For eg. the competition announcement can be. The government will offer the prize of $10 Billion to the team that demonstrates stoppage of aging from the age of 30 to 40. (Here, B is 30 and I is 10)
What do you think are the optimal values of B and I, given the constraints mentioned above (There are actually two variables which I assumed constant for this , the amount of the prize A and the time in which the research has to be done T.)
The reason I thought this wasn't a straight forward question is that there seem to be tradeoffs between whether to increase the work life time (eg. 30 to 45) or should we cease aging at retirement time (eg. 60 to 75), allowing for greater leisure.
Assume that this therapy is tested on women.
[EDIT : Confusion with the poll system. The polls are in the first comment]