If you think that Thailand does not have the tools and capabilities to enforce this law you are wrong. My calculations indicate that if you are here over 180 days, are single and over 65, if you remit one million baht to Thailand in a tax year you will have a tax liability. And to the degree that remittance crosses the one million mark that liability goes up significantly. Everything is trackable...Wise, Credit Cards. ATM withdrawals...literally everything. If you believe that this is going to be short lived, not enforced or is lacking in details I think you will be in for an unpleasant surprise