@Ally ***********
I agree with most everything you say. We do know that Thailand’s highest tax bracket of 35% equates to approximately USD 120,000. The USA has a DTA in effect. One concern some have is as follows.Earnings of several hundred thousand USD of qualified dividends is taxed in the USA at a maximum 23.8% (with the effective rate less then 20%). In contrast ,Thailand taxation is 35% maximum with the effective rate only minimally lower. With DTA in effect the foreign or Thai citizen is credited with what is paid in the country where the income is earned (USA in this example) and is responsible for the difference. This is not going to effect most foreign retirees as you mentioned but I believe some
(whether they are married to a Thai or not) will find themselves with a Thai tax bill at year end.