Maybe husband should also consider leaving his wife because when they get married, they must have given each other vows to be together when they are rich and poor, when they have joy and problems. Now wife wants to observe how husband try to solve addiction problem instead of helping. Love joined them, but money separated them. From my point of view this wasnt a real marriage then. I would leave a partner if money is what only matters to her.
In my observations, if there are financial difficulties in the family, the relationship between the spouses deteriorates and most often the wives blame the men for not being able to provide for their family. Conversations about equality quickly fall silent when it comes to earning money, because women often earn less and this is clearly not enough to provide for the family. If there is a gambling addiction, then this will only complicate everything, but this can also be dealt with, the main thing is that there is a desire for this on both sides.
Imo this is so low to bind everything to money in family or relationship. Its an endless battle of silly arguments and counterarguments. One person can blame other for being addictive gambler, other person can always name something where first person spends money recklessly on. For example wife complain because husband gamble; husband can complain because wife spend to much on cosmetics. Whole story can be turned upside down so simple. I can complain on wife spending hundreds on thousands on shampoos, masks, collection of creams for every part of a body and so on, and so forth. When husband has huge 2 in 1 bottle of shampoo/body gel, purchased with discount and tooth brush. Nobody divorce because wife spends a lot on cosmetics.