In general, it seems mistaken to regard markets as the causes of corruption and exploitation. At worst, they operate as a neutral medium for the occurrence of such injustices as persons are independently inclined to commit or leave unredressed. At best, they work efficiently to redistribute resources-including body parts-from those who have them to those whose demand for them is greater. And at the very least, they act to dissolve the insulating privileges which protect those corrupt and exploitative local monopolies and concentrations of power that can flourish only when disadvantaged people are legally deprived of access to competing alternatives.