it is not a crime, and, as a matter of fact, in the United States it is Constitutionally protected. And you are right, it is very common, both in Mexico and the United States. It is called "rent seeking" - attempting to obtain monetary or business advantages through the government by lobbying for political action. And, while not immoral or illegal, it is most definitely harmful to the economy. Yes, the taxi union and its members obtain benefits by maintaining the monopoly over transporting tourists, the resulting higher prices paid by tourists most definitely reduce the amount spent by tourists in other venues in Cozumel -- less money spent on souvenirs, less money spent on tshirts, less money spent in restaurants. And, if one is to believe the experience from the deregulation of airlines in the United States, less tourists overall. Rent-seeking is endemic whenever Governments exercise control over economic transactions. The only real cure is to rein in the scope of permissible government action. It's one reason I'm a libertarian.