That's true in Mexico too, if you work for small or local companies in a small/middle city, <$20,000 is almost the rule, but if you go to bigger cities, having enough English skills, with international companies, then salaries are incremented at least 100% (but still far from salaries in the US). That according to my experience, coming from an 800,000 citizens city to Guadalajara second biggest city in Mexico.