I can certainly see why a man would not feel like working hard to provide financial support, and even be too depressed and unable to concentrate to do a good job of it, due to a wife who has no interest in affection, sexual relations, and probably comes up short in the Respect & Admiration departments, as well.

But, as several of us have said, there is more to this problem than just sex and money. It seems to me that both of you are comfortable with using this simplistic explanation in order to avoid facing the other, deeper sources of conflict.