He could be lying in regard to being financially supported by his wife. In nearly every case I 've come across the Chinese wife bleeds the husband dry financially. If he actually does manage to get the wife to pay for something that would be an "achievement" of sorts on his part.

Let's get this straight, your ex, the Thai lady didn't need any money from you when she left you, she was quite happy having purchased her residency in Australia. I say purchase meaning the short time spent with you was payment like any prostitute-money didn't swap hands but her place in Australia was good enough settlement for her. You have mentioned she's there. Now just because you find yourself in a position of bringing foreigners to the west there's no need to blame the Chinese because she is Thai. Has she brought all her family to Australia yet? You should answer in detail, please as you are giving advice to others. Seems to me that you expect your country to pick up the tab as you haven't picked it up yourself like many other unfortunates.