That was the ONLY hypothetical example given. ??
Wait...I may have misread your comment earlier. So you're saying a wife would file for divorce to get GOVT assistance (like food stamps)? I thought you meant, she would file to get the husband to pay (even if he couldn't afford it). ...the former explanation makes more sense, but it's still a rash attitude which would make reunification less likely, imo.
As I see it, if a prenup was in existence and she knew she couldn't file for divorce, then
1) it's extremely unlikely that she would've moved out to begin with, therefore the stress on the marriage from a separation wouldn't exist and they would be forced to discuss their issues/go to counseling like rational adults, instead of "abandoning ship" like an emotional teenager.
2) she would've had to have stayed with family/friends if she decided to separate, instead of receiving govt assistance and being on her own. This would solve many problems, because her family and friends, if they disagreed with her, would talk some sense into her and get her to realize that BOTH of them are to blame for their marriage problems and they need to get a priest/counselor/parent/expert involved to help. The last thing a woman needs in this type of situation is to be on her own, with no input from those that know her defects and temptations, only listening to sympathetic girlfriends who would blame everything on the husband. This would not lead to reunification and the saving of the marriage.