Taxis in Thailand, especially Bangkok/Pattaya are scurge and a disgrace on the country. The wife who is Thai always comments on the disgraceful service they give, constant complaining about why you don't go further or take a toll way.
The lack of manners and general politness seems to be the norm. I know you may get a good one but most are awful. And before the 'you must be new here brigade' start spouting, thats 23 years experience. Taxis in China are much better, cheaper and more relaible. Taxis in the UK are better, more reliable but more expensive.
The TAT should look at the Taxis as this is the first impression and mostly the impression is disgraceful. Out with the taxi mafia!
We haven't had a story about a taxi driver finding 3 million baht on the back seat of his car and handing it in. I am sure we will soon.