for years i was watching my Thai neighbors getting a new car every few years, i don't think Thais really into second hand vehicles (red plates don't really look flashy on a 10 years old car, unless it's a BMW)
Almost impossible to stop. They are poor desperate people and Thailand is their only way for many of them to put food on the table for their families.
And the situation is getting worse there, not better.
The Thai businesses need them and they need the income.