You know shit.
You live in a worse bubble than SF, and that is saying something. Life expectancy is not increasing for everyone, and has decreased for many, for instance, less educated whites.
Here's a great chart about life expectancy. Get DH to read it to you.
http://theincidentaleconomist.com/wordpress/zombie-life-expectancy-arguments/
Your 120 year life expectancy in a decade is science fiction on par with something a doddering Reagan would have pushed. It's complete fantasy. Already we see differences in life expectancy based on income and socio-economic class, imagine if such a break through were to occur? Who would benefit? Who would not benefit? Any such break through is many decades off anyway (I'd say easily 100 years off, but that is just a guess), but even so.
Then to just dismiss the fact that manual labor becomes more and more difficult from 40 up. You have 60 yo's barely hanging on, or not hanging on at all, and you crazy bastards want to raise the retirement age. What rarefied air you must breath. Thank God I somehow have avoided sniffing that shit.