A longer life, who benefits the most?

Altering atoms in food, it is claimed, could increase our life span.
The Metro, march 26th 2007.
Worms fed nutrients containing natural isotopes reportedly lengthened their life by a tenth. Scientists believe they may have found a way to slow the ageing process and say that, if further tests are successful, the implications are profound.
The article names some of the scientists and gives more details concluding that, preliminary findings indicate that ‘this approach can potentially increase lifespan without adverse side effects’.
Living longer is a problem in capitalism; the recent debate re increasing the retirement age and pensions still goes on. So who benefits the most if this all proves a reality?The answer is not difficult to find, members of the capitalist class will continue to live a life of wealth and luxury while making sure we retire at further distant retirement ages, that is unless we the working class refuse to abolish the capitalist system and the adverse side effects.