Men and women would have to actually need each other for the contract to make sense.
But, the toothpaste is out of the tube. I don't feel the need to get married because anything a wife can do, I can do with appliances and without breaking a sweat. Anything else can be supplemented by services. House dirty? My robot vacuum picks up a lot of the slack, and if I don't want to do the rest on my own, I can schedule a maid service. If I don't cook my own meals, GrubHub can be my personal chef. Something broken? Need some tough work done? There's apps that will hail handy-people for you. It doesn't end there; there's a plethora of engaging entertainment you can engage with and you don't even have to leave your home. This situation is salient to both men and women.
I think marriage will continue to decline no matter what, but one thing that might make it somewhat more appealing is if western culture could do away with the needless expenses around the tradition and the ceremony. The amount spent on a mere ring is absurd(honestly wtf is going on here), but people want these crazy weddings where 3 parties, the couple, the wife's parents, and the husband's parents have to chip in. The dress has to be expensive, the venue has to be expensive and booked way in advance, the catering is expensive, etc. And I'm supposed to want all of this? Good grief.
If it was not a disappointment that people have modest weddings, perhaps a few more people might get married? Eh, I don't really know about that.
By the way, I'm in no way complaining. There was a time not that long ago when even men who weren't married by a certain age had a stigma against them. In some ways that stigma still exists, but it's largely been defanged as companies today are perfectly willing to hire men who don't have families.