Not if you retain tax residency in your home country. For Australians anyone. We've got a pretty water tight DTA. We can only be taxed in one country. Your country might be different
The mugs who are so excited to get a tax ID and file a Thai Tax Return have total freedom of choice. Those of us who have already paid taxes elsewhere and retain tax residency in another country will choose not to do so.
I really can't get that worked up over 300 baht, but I do realise Thailand attracts more than its fair share of Cheap Charlies. I have always, and will continue to distance myself from all these "fuzzy" attractions which expats have orgasms over, such as Pink ID Card, Blue book, Yellow Book, Green Book, Purple Book, Driver's License. I will never buy property here. I distance myself as much as possible, as it's imperative for me to retain Australian Tax Residency. All I've got in Thailand is a 12-month lease and a bank account. In Australia I've got this magic seniors card which means I can travel all around NSW for a maximum $2.50 per day capped. Foreigners don't get that. That's my entitlement as an Australian Citizen, so why shouldn't Thai citizens get discounts? Happens all over the world. International University Student fees in Australia are much higher than for domestic, but again, why shouldn't Australians get it cheaper? It's sad you're against that, but you'd better get used to it because that's the way of the world.
It won't affect residents, as those on non-imm visas don't require an ETA. Yeah the ETA might have lifespan of twelve months, but hopefully it won't, so the perpetual border bouncers will have to cough up! I'm fortunate in that I don't mind Thai people getting a discount to visit national parks which they actually own - certainly not over 300 baht. I know some chumps who fork out
*****
baht each year for their visa extension to an agent and yet meltdown over 300 to get into a national park! Double pricing favouring different groups or citizens exist all over the world, but most people pretend to ignore them. My barber discriminates against younger people by giving discounts to seniors for a haircut! 😂😂😂