My wife is an owner of a hair salon. Over the last 6 years what I have seen with thai staff ( 6 in all)
First they come in saying that they have all the training and qualifications to work in a salon. We ask to see there certifications , but for some reason or another they can't provide it. Than say they want 40% of all the work they do. After starting to only find out they fall short of being able to perform all the work. They can't cut hair, do color and so forth.
All of them could not be trusted. If we left the staff alone at the shop and they had customers the money would go into their pockets. One went as far as telling the customers that it was her shop and the certificates of training hanging on the wall were hers.
The first month the thai staff come on time and works until close. After that they start coming in later and leaving earlier. Cheating and telling lies comes so easy for them.
It is so much easier to work without thai staff than with.