I get why people are facinated by this sort of research, but pick your favorite nasty person, such as Putin, and consider what it would mean to radically extend

I get why people are facinated by this sort of research, but pick your favorite nasty person, such as Putin, and consider what it would mean to radically extend their life. People in in Congress (an oxymoron) would be there even longer as they generally have to die to get kicked out. The longer they're there, the less they care about you and the more they'll care about their long lived fellow travelers.