One point that the Thai people in general fail to appreciate that in many cases it is not the foreigner who ends up paying. Those of us who have a family here will, when we die, leave to that Thai family whatever is left in our estate. They will end up the loosers.
I have recently needed a CT scan at a government hospital. When booking the scan, we were told that it would cost Baht 17,000 but to bring a total of Baht 25,000 to cover total costs. The bill charged turned out to be Baht 29,000 for the scan with the total coming over Baht 50,000.