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The commuter population is what makes many towns prosperous. Examples: Sevenoaks, Tonbridge, Tunbridge Wells, Guildford, Dorking, Leatherhead, Beaconsfield, High Wycombe, Hemel Hempstead, Harlow, Saffron Walden, the list goes on and on. None of those towns has much local employment but they are populated by affluent people.