Daniel Akst wants a market in kidney donations:

The unearned piety of those who condemn these transactions strikes me as outrageous. If someone has the right to abort her own fetus, why does she not have the right to sell her own kidney? By what authority does the state tell me I cannot save myself or my family members by paying money I earned to a willing seller of a surplus item? In fact, why wouldn't a system of national health insurance include a provision for organ purchases? These transactions should not just be legal for the rich but subsidized for the poor, all in a carefully designed and closely regulated marketplace serving buyers, sellers and even medical ethicists. It's a shame that even one more person has to die before this law is changed.

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