All that is completely irrelevant to the problem. Births outnumber deaths by 2.5 to 1 worldwide and as there is no such thing as a carbon neutral human being (Or anywhere near it) we are heading towards the end of our time as a species unless we take measures which, at least for the moment, most people find unpalatable.
How benefits are shared out and when we retire will one day be a worry so low down they won't matter.
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