Well, one could still talk about the attractiveness of 0-hour working vs. n-hour working mates, but that's not as intuitively forceful.
I, for one, am more attracted to the latter (and indeed my partner makes more money than myself), but I know that there exist men who are more attracted to the former. (Attractiveness is a two-place word.)
Yes, but when we're talking about a broad societal phenomenon, we need generalisations. And I would think that some decades ago, the average male found the wife they could expect to get with a 2n/0 arrangement, weighed by the probability of her existence, more attractive. Also, bogus below is quite right to point out that the 2n/0 arrangement used to give you higher social status.
As for today, I'm not sure. My impression is that the 2n/0 option is plainly unavailable for many people. And indeed, the meaning of a woman not working has changed, which may influence the attractiveness equation (including for the average male).
Dalrock writes an interesting article related to Dr. Helen Smith's book the Marriage Strike. I really have to bump it up on my too rapidly growing reading list. (^_^)