Mexico is getting more expensive because their central bank is printing money, just like everywhere else in the world. It’s still way cheaper than the US. wealth inequality was always massive there, just like all of latam. The rich own the assets so thus they benefit from the money printing, while the poor are negatively affected by it as their cost of living goes up. It has nothing to do with Americans being there. That’s actually a plus to their gdp. Tourism is a huge part of Mexicos gdp and they do not want to hurt this. It’s all just another psyop