Sometimes you have to find out for yourself that life isn't always greener on the other side. Each to their own, but I'll take my chances in the US. There really is no other place in the world as diverse as the US , even as dysfunctional as it is.
But what you don't realize is not all developing countries are equal, and even within some poor countries there are cities with a high quality of life. Ecuador has been called the best country to retire by International Living for the last 6 years now. You can live on beautiful beaches there or in a scenic mountain city. Cuenca, the third largest city, has modern malls and beautiful colonial architecture. Modern hospitals with affordable, first rate care by English speaking doctors. Extremely affordable produce. They are currently laying fiber-optic cable from the U.S. so the Internet is about to become much faster. Cuenca has about 5,000 Americans and many other foreigners there and it's just one of a number of places that have sizeable expat populations. The President, Rafael Correa, is a Harvard trained economist who's also a Leftist, determined to make his country better. Ecuador got alot of attention a few years ago for a new constitution that said the environment had rights too. This got alot of conservatives in the U.S. like Rush Limbaugh all riled up because Ecuador is an OPEC nation, and oil companies from the U.S. were forced to clean up their act in the Amazon. Gasoline is subsidized at about $2 a gallon and diesel is half that. They also use the U.S. Dollar as their currency.
Ecuador is one of a handful of places I'm considering. Colombia has an even better infrastructure and Americans are starting to move there in bigger numbers. It has that drug reputation, but a very good President came in and did alot to clean the place up. Medellin has a near perfect climate, has just about anything you'd find in the States. A mall with over 400 stores recently opened there. On the other end of the spectrum there are some small cities in northern Nicaragua with a tolerable climate where my wife and I could live decently on $600 a month. And people want to believe what they want to, but there are many cities in Mexico where a couple can live well for less than $1500 a month. American companies are everywhere. If you had $2500 a month in Mexico you could have a lifestyle that would take $6000 a month in the States.
No place is perfect, but affordability coupled with a great climate and scenery, and the ability to stay in touch on the Internet, as well as fly home on discount airlines like Spirit, make the choice between retiring in my 50's or grinding it out into my late 60's and barely scraping by an easy choice for me.