One big thing everyone is overlooking: even if you don't owe anything, you will have to fill out a tax form to prove it. At that point, you are trapped in the tax system.
I am taking 2 precautionary measures right now, in the unlikely event that this is implemented in 2024:
1) Transferring in money from the US to my Thai bank before January 1.
2) I will spend the first 2 months of the year abroad. If this tax thing has crashed and burned by then, no problem. If it is still a threat after February 1, I will plan further trips overseas (out of Thailand).