Yes I agree. I was posting from their perspective.
I am of the opinion that the tax proposal for foreign earned income not remitted to Thailand is a ridiculous idea that could never be implemented. If they did implement it, it would cause tremendous damage and therefore it will be shelved.
The 300 Baht charge would have no effect if they could sneak it into the airfare without anyone noticing. If they had to collect it at the airport like they used to, it could cause ill feeling and negative publicity, hence them abandoning it.