What else can you learn about a different country

Today I want to talk about something that happened to me today in a Mexican airport.  I went into the counter and got our boarding passes for me and 2 of my kids.  I'm a Mexican citizen, but they are American.  After I got my tickets they told me to proceed to immigration to get my boarding passes stamped.  It was in immigration that the problems began.  I was told that my passport had not been stamped when I entered the country, and that my 2 kids were illegal aliens in the country.  That is not all, I asked what I needed to do to correct the mistake done by someone from the same department by not stamping my document correctly or even looking at them?.  I was told I had to go downtown and talk to someone there (Good luck!).  Isn't that ridiculous?, as I later found out, this happens often and I was not a single incident, so why don't they do something about it???  I don't know.  You may want to know what happened next?  I got to talk to the person responsible for that department, and after being scolded like a small kid for something I was not supposed to do anyway, they gratefully let me into the plane about 2 mins before closing the gate.  I made it, thank God.  I left Mexico very disappointed although not surprised.  No wonder is hard to find investors who want to do any kind of dealings in Mexico, and the fact that Mexico is getting beat single handedly by China.  Who wants to put money in a country where the government employees do not use there heads to solve something that is trivial.  I had read earlier this year a book by Jim Rogers titled "Adventure Capitalist," by the way great book, read it if you ever have a chance.  The point is that in this book the author tells his adventures as he goes around the world during 3 years, and he looks at each country from the investment point of view.  The last country he visits before going back to the states is Mexico.  In his book he tells how disappointed he is of Mexico, and how it has not lived up the hype it generated when the NAFTA was first signed between USA, Canada, and Mexico.  I could not agree more with him and his comments.  It hurts me to see that Mexico has missed the boat and is still missing the boat.  With great people and great talent is hard to believe that they do not have the imagination to make life easier and attract more people.  A question I still have (and I'll appreciate any comments from people knowledgeable on this topic) is how can the Mexican government hold me and my kids from traveling to the United States (my country of residence and their native country) when I have a legal document where my wife gives me permission to travel with my 2 kids without her?  Hell will freeze over when the US government detains a Mexican that wants to go back to Mexico.  Did I really violate the law by not having my passport stamped or my kids forms stamped?, and how am I supposed to know the procedure in order to remind the immigration official that looked over my documents that he is not doing his job??  Any way, as you can tell I'm still fuming over this one.