The buyer is giving up only money – perhaps earned on a lucky stock trade or at an overpaid job. If that money had been earned by selling a portion of a lung, or represented savings painfully accumulated during years of backbreaking work, we might consider the exchange more equal.
再一次，我们的不安可能部分来自我们对不公平交换的定义。出售者在一次不可逆的交易中放弃了身体的一部分。购买者只放弃了金钱——这笔钱可能来自某次撞大运的炒股或薪酬过高的工作。如果这笔钱本身便来自出售一部分肺脏，或是多年来辛勤劳作、一分一厘苦苦储蓄而得，我们或许会觉得这样的交换会公平些。