http://www.washingtonpost.com/blogs/wonkblog/wp/2013/03/27/why-fiscal-conservatives-should-love-gay-marriage/

“Marriage in most states creates a mutual support obligation. That takes up a lot of the slack for taking care of an individual, if he loses a job, gets sick, built into our public assistance system,” says economist Lee Badgett, a professor at the University of Massachusetts-Amherst.