Airports Of Thailand (AOT) To Raise Air Passenger Fees

their land, their airport, their decision about fees - pay it or take the bus

My point exactly. And taking the bus rather than flying is exactly what many Thai people might start doing if the domestic passenger fee is raised by 150%. I don't think I have ever seen an airfare where the airport passenger service tax is equal to 20% of the total ticket price, and that will be the case for many domestic low cost carrier tickets after the tax hike.

And for what? AOT is already making a profit of 2 billion baht/year.