linking the two (marriage and children) together might work in say, a sub-community
setting, like a community that shared a religious network, a church. or a close-knit network of families or friends who met regularly and shared the same philosophies. but expecting that the general public can unite those two concepts together is like expecting *insert cool analogy here NTs, please*, which just isn't going to happen, no matter how much we all may want it to.
again, the people who would wait to have sex until they are married are obviously already value driven and would probably do what it takes for their offspring no matter if they got married or not. and there are so many who have, for whatever reason, written marriage off for themselves, as the article attests. so you aren't going to sound plausible to them talking about waiting to have kids until marriage, if they already feel or know they have no desire to get married. you must appeal to these people on a different plane, one that speaks their language.
the answer? i dunno. birth control is pretty easy and available; withdrawal, as ivy so aptly called attention to; condoms.
then you get into the tough stuff like 'strengthening family values' etc., which the bush admin was all about. i think studies showed the pregnancy rate actually increased when the focus shifted in schools from birth control counseling to abstinence education....but don't crucify me on this. *cringe*
i'm not sure of the answers for society, but i do believe you are wasting your breath postulating to society not to have sex until you are married