overall, nobody gives a rats ass about the lost world down under. As I also clearly stated here, it depends on the unique individual tax agreement your nation has with Thailand. Follow that first.
there is such thing as 'abusing the system'. There is using the system as it is set up. And in spite of some oddly misplaced angst from a few regular commenters here, agents are thriving.
it doesn't really depend on the monies remitted. It depends on the tax treaty between Thailand and your home nation. Each is unique, albeit with some overriding similarities