Longsword, I am no psychoanalysist but when I did my MA in Psychology we covered addiction quite extensively. Shopping addiction has similar features to any addiction, but often occurs more in women. People can get addicted to almost anything if we are inclined to, and we usually use whatever we are addicted to as a substitute for something else. Often these relationships are extremely complex. Feelings of despair and depression can lead to addicitive behaviours that give us short-term satisfaction but are followed by feelings of helplessness, guilt, sadness and depression again. This is often a physical (neurochemical) and emotional attachment, and may be accompanied one or more other addictive behaviours such as abusing perscription drugs, alcholism, sex addiction and others. Addiction is often referred to as a cycle since addicts feel anxiety, are down and engage in the behaviour, then feel good, then bad, then seek to feel good again, do the behaviour, feel good and so on. Eventually it doesn't feel good anymore, but they feel powerless to stop.
When we attempt to get off an addition without a subsitute we almost always go back because there is nothing to replace what the addition was doing for us. The object becomes a key to our lock, and in a very real sense we are training our brains to become more sensitive to the neurochemical rush every time we satisfy our craving.
The good news is you can defeat addiction begining with admitting you have a problem and having the willingness to change. Unfortunately, the only person who can do this is the addict.
Often supporters unknowingly 'enable' the addiction, and sometimes this enabling behaviour can be quite tricky to spot. If she can equate you with any part of the addiction, ie: source of money, then she will continue to work you and will not stop until she recieves satisfaction. This is the really hard part about addiction. It doesn't mean she doesn't love you, it means she will use anyone and anything to get what she desires. If she learns you will support her shopping sprees then she will know you aren't a barrier to obtaining what she wants.
Often addicts have a very strong inner turmoil about the addiction. They know they have a problem and feel alone and helpless to stop. If you can access this part of her then it is a beginning to her admitting she has a problem and this is the first step. Often the biggest hurdle. She then needs to know in very clear terms how her addiction is effecting your relationship, and then what you would like her to do. Getting her to admit she needs help is a very postive step.
Your posts show many of the classic signs that would indicate your wife might have an addiction. I would seriously consider getting professional help. Addictions can be signs that there are deeper psychological issues that need to be addressed in order for the person to have a happy fulfilling life. Society might be contributing to this addiction, yes I wholeheartedly agree. But ultimately, it is your wife's behaviour that is the problem for both of you.
http://www.4therapy.com/consumer/life_t ... Have+It%3F
As for short-term things you both can do together. (It's important she agrees to do this with you as part of controlling the addiction)
Never shop without a list.
Don't use credit cards.
Keep seperate accounts, give her an allowance.
Reward non-addictive healthy behaviours with healthy rewards
Record every purchase.
Write lists of future financial goals, and plans to achieve them so she can see the long-term benefits.
A professional can give you more advice and information than I can. I wish you well and hopefully this has been helpful.