Walter Williams from the article: " In a free society, people earn income by serving their fellow man. Here's an example: I mow your lawn, and you pay me $40. Then I go to my grocer and demand two six-packs of beer and 3 pounds of steak. In effect, the grocer says, "Williams, you are asking your fellow man to serve you by giving you beer and steak. What did you do to serve your fellow man?" My response is, "I mowed his lawn." The grocer says, "Prove it." That's when I produce the $40. We can think of the, say, two $20 bills as certificates of performance — proof that I served my fellow man."
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