> This is meant primarily for Thai people
I didn't get that impression. Not written in or translated to Thai for one thing.
> there is also a history of foreigners making it very large in Thailand.
Many Chinese, Japanese, Koreans, and Singaporeans, sure, already wealthy before coming to Thailand, or well-connected. Can you name any foreigners (generally construed as Europeans, Americans, Australians by Thais, i.e. farang) since the post-colonial period in SE Asia? Jim Thompson comes to mind, but even he didn't make it very large by the standards of the Thai wealthy.
