Just by the way, the kesuba is not “halacha limosha misiyni”. its a contract. and if the wife is willing to say that if he goes to learn she will be mivater on that part of the kesuba for now then its completely fine. When it comes time that she is no longer mivater, or willing to exchange the zchus from his learning for her being the one out working, then he has to go out and make the $.
And what happens when the husband is working but his salary is not enough and she goes out to work too? is that any better??