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Can you imagine how aging would blow up the current social programs?

Even countries like Japanese are facing a situation where social programs will need to be cut as the number of workers per retired person is getting very lopsided.

I would imagine if we extended human life expectancy to say 120 on average, we’d need to bump the retirement age to 85 just to keep the books balanced.

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The whole concept of retirement is based off of peoples’ bodies breaking down to the point where they can’t work anymore. If we had genuine rejuvenation, a 100 year old would be just as capable of working as a 20 year old.

So get to live another 40 years but it’s just working longer?

Obviously not, it depends on the ratio. Because roughly every year you contribute is a year you can rest on your laurels. If we currently live to 80, and work on average 20-65, that's 45/80, so the same ratio of working years is 67 of the 120 living years. Retirement would be 87.

I don’t think that would be very controversial. Work is just 40 hours a week on average.

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