preempting a powerful counter arguement to your drivel by saying "go ahead and use the infertile argument" is not really effective. All you are saying is that you have no answer to it.
Additionally, your premise displays the scope of your ignorance. Marriage is most certainly in part about cash, but it is about much more as well. Legally, I am speaking, not emotionally. The government does not need to be in the business of affirming romance.
The single most significant reason to marry is power, not money.
When the significant other of an unmarried couple is in the hospital and incapacited, the sick person's parents, sibling, or even 3rd cousins can have some say about the wishes of the infirmed, the unmarried significant other can't.
When an unmarried couple with a child has the child in a hospital, again - unless adopted by the other parent (something most states do not allow, though that trend is changing. Here is an excellent short article discussing these issues, if interested -
http://writ.news.findlaw.com/grossman/20040419.html ) -only one of the two parents has anything to say about that child's disposition and again, the parents, siblings and 3rd cousins would have authority in the case that the legal parent was unavilable.
There are a whole host of Tort rules that exclude unmarried couples from acting on their partner's behalf, where married couples can. (See,
http://writ.news.findlaw.com/sebok/20040409.html for a brief overview of some of teh consequences.)
There (most significant'y effecting me, right now) is the ability to be allowed to live in the same country as your partner. Over the more than 11 years I have been together with my partner, we have had to spend large portions of that apart. Why? He is Japanese. To be in this country (until he gets his permanent residency), he has to be either in school or at a job that is sponsoring his F1 visa. It now looks like we are about to be seperated yet again because I am about to take a job in Los Angeles and he will be stuck in New York until he can get a job in L.A. that will sponsor him (at elast a year most likely) or until he gets his permanent residence (apx. 5 more years there). If we could be married, this issue would have dissapeared years ago.
There are a ton of other issues ranging from serious issues to minor inconveniences, but that have nothing to do with cash, that unmarried couples face that married ones do not.
Since you are a breader, you don't have to deal with these issues on a day to day basis, so you are free to make comments as stupid as the one you made. In the future (on this subject or others), I'd reccomend a modicum of research before blathering some ignorant opinion, such as the one above.