mytwolabs
sadly what u describe is "par for the course" for addicts. they can lose lots of money in no time. they can be from any socio-economic background, uneducated, super educated, or anything in-between.
The lying, the excuses, rationalizations, etc etc is automatic.
Many people were abused as children though not 100% become addicts. My aw was not alcoholic for the first few years we were married. She did tell me she was physically abused as a child but luckily that was in the past and she overcame the past.
After she crossed the line from normal social drinking to alcoholism, the childhood abuse became a "handy justification for drinking" among whatever other "justification for a given day" was in place.
Like others have said, don't make yourself crazy trying to assign reason where there is none. Protect yourself financially and legally and try to learn as much as you can about addiction.
Big hug