//North America has a similar grouping with USA, Canada and Mexico. Has does the Carib and Latin countries.//
So tell me, do Mexicans have the unfettered right to live and work in the USA? Is there any form of (as an example) a "working time directive" that restricts the hours that the citizens of the members of this grouping can work? Does it impose fiscal rules and restrictions on its members? Does this grouping have a "Commission" and a "Parliament" that can impose legislation on its members which trump national laws? I could go on, but I'm sure you get my drift.