Extending life spans need not necessarily break the SS system if it means people work longer before they retire.
The SS system is already broke. There is no "Trust Fund". There are no assets. Fannie Mae and Freddie Mac are almost defunct. GM and GE are toast, somebody convinced them they should be banks instead of manufacterers.
So what's left? But a government bond? Put your money into a 401k at Bank of America? You haven't seen a lowering in the debt limit for more than a decade.
I guess you are proposing that nobody be able to save anything, they will work till the day they die, and it's all for the "chilrun"