In South Korea’s capital, more than one in three people live alone, creating headaches when it comes time to visit hospital or simply move home. But Seoul has a solution: a “companion service” that dispatches helpers to assist solo residents with tasks that are hard to manage without a second pair of hands. On Sunday, the city’s government announced that the programme, which began more than four years ago as a hospital escort service, would soon be expanded to cover moving day logistics and...