On one hand, senior people who moved overseas have already established their life in the EU or US, have a family and children, etc. Also, people who move away

On one hand, senior people who moved overseas have already established their life in the EU or US, have a family and children, etc. Also, people who move away generally do so for reasons beyond money. Like you say, even a mid-senior role pays very well for Latam, but people end up moving for things like safety (most Latam cities are generally much less safe), education (quality education is difficult to come by in many countries), or career advancement (unfortunately most companies won't accept executive roles in Latam, or will do so at Latam salaries which are actually a step down). In my personal experience, with a third of my friends having moved overseas, career advancement and getting away from difficult situations make up most of the reasons for not coming back. Friends who've experienced traumatic robberies or violent situations or who come from broken families generally want to get away from that and career advancement and money just end up being the excuse.