Fairness is futile

Well, of course not. Only when it comes to government policy:

Suppose that Jack and Jill draw equal amounts of water from a community well. Jack's income is $10,000, of which he is taxed 10%, or $1,000, to support the well. Jill's income is $100,000, of which she is taxed 5%, or $5,000, to support the well. In which direction is the policy unfair?"

An honest person will admit that this question has no indisputably right answer. Prof. Landsburg then asked "If I can't tell what's fair in a world of two people and one well, how can I tell what's fair in a country with 250 million people and tens of thousands of government services?"