I am not saying I am not a tax resident anywhere. I am a tax resident in another country and cannot get around that. Ok, I do earn some income in Thailand, and pay taxes on it, all 3,500 Baht interest from my bank account. I have never seen or been told that I am a tax resident in Thailand even though I spend 90% of the year here. Just went through this with broker accounts I set up earlier this year in Europe, US & Asia, and their compliance departments were satisfied with my explanation of where my tax jurisdiction is and that I have no tax liability in Thailand even though I consider myself a resident here, which at this time, I believe to be completely true.
I did try searching for guidelines of what makes a tax resident, a resident of a country, and as long as I do what I need for my legal tax jurisdiction in another country I am good.
If Thailand tries coming after all income earned abroad by a retiree residing in Thailand, yet who is not allowed to work in Thailand, well they cannot even accomplish this with their own citizens.