Obviously contracts would be tailored differently with people who want kids.Maybe 10,15,20 or perhaps different options would be available depending on what the couple mutually agreed on.I'm not suggesting doing away with traditional marriage, I'm just suggesting offering alternatives.
I can see it. Mary Ann? Will you contract #4 me?
Brad! I'd love to! I never expected you to want a committment in the single digits...
Granted, traditional marriage has its problems. So how do we work through those? How do we prevent someone from running off to Vegas after four weeks then getting an annullment. How do we make sure people pick partners based on real, shared values? How do we make sure that they know how to solve conflicts, that they have similar ideas of what should be expected of them in a relationship. Prenuptual agreements? Funding for drug abuse prevention? Or, if the answer is that 'some people are just ***holes' how do we keep ourselves from marrying such people?
Kids need a stable environment. There might be some cases (abuse, etc.) where they're better off with a divorce.
What about people who stay in 'too long' trying to make things work? I don't think that every relationship has the same problems. What were yours? What caused them? When did you notice them?