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the profit made using these machines is used by the military for their own programs so the money just goes back to them but it raises a few questions. first of all, how ethical it is to put slot machines in an environment where the tension, risk and stress are high? these soldiers undergo intense mental training trying to fight off traumatic experiences and loneliness away from their families and home. are these machines making them a lot more vulnerable to addiction?
Like what you mentioned, these soldiers are already trained to withstand any kind of mental torture, risks, and other anxiety in the course of their training. Gambling to them serves primarily for entertainment at this point given that they are exposed to an environment where tomorrow or today could be their last day.
I doubt that these soldiers would be addicted to gambling; it's more of they would do anything to keep them entertained because that's the least thing they have to worry about.I also don't see the reason why they would get gambling addiction by playing in those slot games. I'm sure that they are well compensated as they serve their country and risk their lives.
I don't think that their salary is that small that may cause them to do gambling in a way that will push them into addiction.