Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

What are the downsides that prevent more people from working in high-income countries, and then retiring in low-income (and cost of living) ones?
At retirement age, your life priorities are somewhat different, and two key items come to mind.  Your social circle, community and extended family contacts are highly related with your lifespan at retirement age. Loneliness kills, literally. Long distance relocation would weaken those ties exactly at the time when you most need and want them. You are also likely to need at least occasional physical assistance at random times, so living in a spot where none your friends&family can visit at a day's notice is hard. Cheaper living locations tend to have worse healthcare. Again, this doesn't matter much for a 25 year old expat, but at an age where you likely have one or multiple chronic diseases, general frailty and a very frequent need for healthcare this is a priority. This might work if you can do it as a family. I met a retired British couple in southern India, and they had a nice system where they were living in UK during the (UK) summer, and in India for the rest of the year. However, the above concerns don't disappear - when at a later time their health deterioates and one of them dies, then it would probably be better for the widow[er] to stay in UK permanently closer to their extended family and with the local healthcare system.