Your comments are grey because your statements are completely ignorant.<p>Major cities instituted a medallion system for taxi, restricting who could operate a taxi service.  The owners of the cab companies in major cities bribed the local governments into limiting the number of medallions in circulation, then bought all of the medallions.  Meaning that cab companies have government-sanctioned monopolies on taxi service in many major metro areas of the US.<p>As others stated, this is an example of a cartel, not a labor union.  And the entire purpose of cartels is to maintain artificially high prices.