Undefined words have a special power in politics, particularly when they invoke some principle that engages people’s emotions.
“Fair” is one of those undefined words which have attracted political support for various policies. While the fact that the word is undefined is an intellectual handicap, it is a huge political advantage. People with very different views on substantive issues can be unified and mobilized behind a word that papers over their differing, and sometimes even mutually contradictory, ideas. Who, after all, is in favor of unfairness? And who, after all, dares to point out the fallacies of a belief as long as it carries the “intent” for fairness?