I think Thailand would be better off by simply adding a tax on goods and services to non Thai citizens. You show your id and if you’re Thai, you don’t pay it. Much simpler imo than the double tax idea.
It seems that many ex pats are living on $1000-2000/month which in their home countries isn’t much, so their are low. But in Thailand, that’s still 2-4x the average income and thus would put them in much higher tax brackets relatively speaking. Thus effectively forcing those ex pats to leave or significantly reduce their standards of living in Thailand causing them to reconsider other options like Vietnam.
Plus at 65k thb a year, it’s 12 years to put in the 800k. So 70,000 thb the rest if your life is an exaggeration unless you intend on dying in the next 12 years. So…that’s only $24k USD for the hassle and stress of not making a payment for 12 years.
12,000 THB? That’s only like $375. No offense…that would be dirt cheap in the US. I pay $15,000 USD a year in US for an hmo and that’s not counting out of pocket expenses. Just for the insurance.