Of course, there are many indirect victims of gambling addiction. Can you add more?
One of the indirect victims is work or the company, it is hard to be productive if your mind wanders on gambling, and the company will suffer because of low productivity brought by people who cannot handle their gambling activity, just imagine if there are 5 gambling addicts within a company, the company will breakdown and they will have to fire these people and train new people to replace these people especially if the affected workers are those from upper rank.
These are indirect parties that will suffer from people who are addicted to gambling.