@Leeds forever!
Yes right I have been living in about 20Â different countries in my past 43 years when working abroad and had my original residency with my own country established and registered abroad at my Embassy, so that I could be exempted in my country and eventually pay taxes in other country where I was staying, or where I was for more than 181 days. Which is the first step of "Double Taxation Agreements". I know this agreements well too.
But a salary issued and paid by a company in the original country in a local bank account, and not transfered abroad systematically every month to a bank abroad like happens for a monthly salary, makes in any case impossible to demonstrate that a foreigner living in Thailand has an income from somewhere and as I told if the daily life is paid by a foreign credit card, or a foreign ATM debit card, that can take cash advance, or sometimes making an international bank transfer from yourself to yourself here, all this cannot be considered an income earned by working which is the most important point for Thai tax law, or even by a pension which is not an income but an already taxed form of saving that you get back after finishing your working life. So they do not have elements and evidence to affirm such a condition.
Sure the bank can say that you have some money here but cannot say that is coming from a company or an institution if it comes from yourself to yourself and in consequence cannot be considered an income, which are all details that are specified in the "Double tax agreements"
The only condition that could advise them is to show your monthly income to immigration to obtain the Ret. Stay permit with the famous 65,000 baht per month, then you give in their hands the official document that shows an existing income, and this can be used by them to ask for tax. Otherwise if you invest in a house and bring in the necessary amount that will be taxed when you register the house at the Land office but cannot be taxed as an income.
So you know well your reality and I know well my reality, and nobody wants to take your supremacy in knowledge but just express an opinion. Don't feel every time that you lose your TopGun position, nobody is stealing you any of your reached ranking position.... just relax. Bye, enjoy your life.