unless the slave owners are gay, it won't even be tried
If they go to a cashless system, every dime anybody spends will be completely traceable. That means men can't buy sex any more, without their wives finding out. Not even the ones who go to an ATM once a week, take out $100 for food, stash away $20 for some sex, and after they have done this 8 times, and saved up $160, they go buy themselves a happy ending massage.
Not only are men slaves to the job, they are slaves to their wives, who dictate sexual abstinence. A cashless society will put hookahs out of business and put unbearable stress on the average working Joe's, who are the backbone of society. Cripple that and the country cracks up. Everybody goes postal. Prostitution is the oldest profession. If God can't stop it, why does everybody think the trilateral commission can?
Make life any more unbearable than it already is, and the will to live will go missing. Think war is bad now? Imagine an suicidal army that doesn't think life is worth living anyways. Maybe they all turn their guns on themselves in a mass exodus.