Original sentence: In 2009, Sandel criticized Nobel Prize-winning economist Gary Becker's free-market immigration proposal.This proposed solution entailed imposing refugee quotas on nations according to their wealth and then allowing countries to pay other, poorer countries to take refugees allotted under their quota
Edited sentence: In 2009, he criticized Gary Becker's immigration proposal to sell American citizenship by suggesting an alternative free market solution.This 'solution' entailed imposing refugee quotas on nations according to their wealth and then allowing countries to pay other, poorer countries to take refugees allotted under their quota.Thought experiments like this are a common device in Sandel's lectures, typically proposing something that appears acceptable according to mainstream received wisdom before developing the argument to expose its flaws