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It's the generation that raised South Korea from the ashes of war to one of the richest, most technologically advanced countries on earth. Even without a Confucian tradition of filial piety, you'd think they'd at least be made comfortable in their old age. But they're not. South Korea has the highest rates of suicide and relative poverty among seniors in the rich world. For some this has meant finding a second career to make ends meet. At a park in Seoul, Lucy Williamson finds an old profession getting some surprising new recruits.