Can we afford to pay pensions, given the huge demographic challenge of our ageing population?
Ponder the case of John Janeway, who fought in the US Civil War.
But it's not easy to persuade people to focus on the distant future. One survey suggests under-50s are barely half as likely as over-50s to say retirement is their top financial concern. Behavioural economists have come up with some clever solutions, such as automatically enrolling people in workplace pension schemes and scheduling more saving from future pay rises. These"nudges" work pretty well - we could opt out but instead we tend to save through sheer inertia.
In tribes such as the Aché, those costs were higher - because they moved around a lot or food was frequently scarce.
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