I want to punch any public figure in the face who thinks "promoting marriage" is a good idea because "promoting marriage" is already a cultural institution signed into law.
I've already worked out the math: If I could manage a cheap enough birth or adoption, I would save a significant amount of money by having a crotchfruit. Of course the former requires a willing co-conspirator.
I used to work with a guy who made $14/hr and his wife didn't work and they had 7 kids. For years I couldn't understand how he could possibly make ends meet until I looked at the tax credits he was getting and understood that "economies of scale" kind of works for feeding and clothing children.
Edit: Rayiner, since it won't let me reply to you on a dead topic. Married people can and do cheat on their taxes all the time. I know at least a dozen married couples where both file as single and only one claims the dependents. As for social security, the future there is looking pretty grim and the intergenerational continuity concept breaks down (and already has) when an unusually large older generations' votes and financial means allow them to skew the balance in their favor. This idea that I'm selfish because I haven't had kids yet is one that makes me angry and the linked article actually touches on many of the reasons...to the effect of: "because you were born poor and haven't been able to become successful enough to be desirable to mate with, you deserve to continue to be poor."