Selfishness spawns dishonesty.
Addicts are self absorbed people who resort to dishonesty as a survival technique.
I will lie cheat and manipulate to get what I want then I will lie cheat and manipulate some more to avoid taking responsibility for my actions.
We learn what we live.If a child lives with fear he may resort to dishonest to avoid rejection or punishment.Checking our family history can sometimes reveal important clues as to where our behaviour comes from.