Why not export players from Mexico to Europe?

I realized the U.S. is exporting more players to Europe now. Is there something wrong with the structure of the Mexican League, or that Europeans do not value Mexican players? I've always wondered why teams in the World Cup as Paraguay and Ecuador have more players who are with European clubs than Mexico when Mexico is obviously superior to those countries.

How many was sold for $ 2 million and Andres Guardado, one of the promises of Mexico was sold to about 10 million. For Mexican players to go to Mexico, European teams have to spend much money and for Americans its just a couple thousand dollars from the players' own MLS and Mexican league team owner player. Mexico is not export a lot of players to Europe, Brazil and Argentina and Mexico has the money but what Mexico needs to develop more players in Europe, as Dos Santos and Vela. The problem for Mexico is exporting once players become the stars, but the development of players at a young age in European football

[affmage source="ebay" results="90"]Export Cup[/affmage]