Precisely and also the local Revenue office has repeatedly stated among other things and has you have no employment here in Thailand or elsewhere and your personal allowances exceed income coming in then no tax and why you fretting!!!
Well, why not go after the filthy rich of all Nationalities and yes including the elite Thais but no, it would be too difficult as they of course have their own laws and can if necessary, can afford and hire a so-called Lawyer and Accountant!!!