BasketCase
Username sez it all
Having to escort settlers has never had much impact on my economy. When I perform the initial land-grab, I aim to make full use of the land available to me, so I always end up with a pattern of cities whose cultural borders prevent new barbarians from popping up (except for those barbarian uprising things, of course). This means I only need escorts in the unsettled borderlands. Those escorts invariably end up also protecting my border cities, not only from barbarians, but from other civs.