Is it permissible to force one's wife, or those under one's guardianship, not to voluntarily participate in the social security system, and what is the ruling on benefiting from the money obtained from it?

Social security is divided into permissible and forbidden. If the aforementioned insurance is forbidden, then your wife is not allowed to subscribe to it, and you must prevent and advise her. If she does subscribe to it, then neither she nor you are permitted to benefit from its returns except for the amount she has paid.