Thank you Christi for adding the tax ramifications of accepting dollars for the taxi drivers as wellas other businesses in Cozumel. Along with the other costs of exchanging dollars into pesos might clarify the " fuzzy math" for some.
So Taxi drivers have more trouble and expense converting money than anyone else? People taking dollars at 10 to 1 are taking greater advantage of tourist with dollars than many or most other business people who don't. It can't be defended as the cost of taxis doing business when others succeed with a rate much closer to the actual rate.
Maybe that is a new business opportunity? Corporate consultant specializing in developing a business model where 10 to 1 isn't required to succeed! Just figure out how everyone else does it and teach the rest?