Medical research is generally aimed at the most pressing problems facing a society. Infectious disease was a focus for a long time, cancer is one of the biggest targets now. Aging has not been a priority yet, because the vast majority of people die of something else (infections, heart attacks, cancer, etc) before they die of the problems specific to extreme old age.

When we develop treatments capable of reducing the incidence of more common diseases, then focus will shift towards aging and the curve may very well start to bend towards longer lifespans.

If you want this to occur sooner, support more overall scientific funding through your donations, your votes, and your advocacy.