Another thing that also contributes is service staff and moto driver types often being raised by single mothers with no father around and we all know how this turns out:
http://marripedia.org/effects_of_fat...on_crime_rates
Then there is Instagram which thais are top pros at to create false perceptions that every middle class kid is living like the royal family.
This fuels high interest credit demands and in times where payments can't be met this will lead to increased criminality - firstly against foreigners because we're living outside of thai society for the most part and nobody has our back when thais plot and scheme to extort money from us - whether it's a corrupt cop planting stuff on you, giving you a fake positive drug test or the prostitute helping her thug boyfriend / drug dealer / assorted lowlifes she hangs out with.
The portrayal of all westerners in Thailand as criminals for years already when they gleefully show off people arrested for mostly benign white collar crimes like low level fraud committed in their home countries doesn't help it either but their simple minds are largely ruled by jealousy, hatred, a racial inferiority complex and the lower instincts anyway.