I have to deal with Thais very often (in a professional capacity that is).
Tenants and an assortment of builders/repairmen.
You can't squeeze an ounce of truth from them, esp. the second group.
Bare-faced lies, false promises and then some.
Many a time I tried, in vain, to encourage them to tell me the truth.
Never seems to happen.
Lying is a way if life here.
Never gonna change.
Oh..and Thai women are terrible house-keepers.