It seems as disturbing to me as it apparently does to you, but it was recently in the news that the UK actually did a buyout when they abolished slavery. http://www.independent.co.uk/news/uk/home-news/britains-colo...
This was suggested many times during the lead-up to the Civil War, but (I think rightly) Lincoln as well as the more hard-core abolitionists viewed this strategy as contradicting their position that Slavery was a crime against Natural Law.
Lincoln himself was well aware of the costs that would be imposed by war, but chose this course of action due to the absurdly perverse nature of slavery.