Then you would suspect wrong. You can live for somewhere between a third to a tenth of the money in Central America that you can in the US. Lot of folks have nothing but a 2 thousand dollar or so SS to live on...that’s poverty in the US...that’s upper middle class in Central America.
There are cheap places to retire in the US. People have regrets moving far away from home when a spouse dies or when they have major medical problems. And when you get up in age that’s almost guaranteed to happen.
What are the tax implications, if any, of cashing your SS checks and living in another country?