Except for branding experiences promulgated by major political parties our government is not interested in matters of holiness. Our government is occupied almost entirely in matters of property rights. And that is it's role in civil law pertaining to marriage. Who gets what. Who inherits what. And what is Uncle Sam's cut.
In America when it comes to money we have established one egalitarian rule. Everyone gets a shot a the gold ring without discrimination towards the shape, color, or extracurricular activities you have for your plumbing. So here in the land of the depleted 401K the question is not who gets to play. The question is do we heterosexuals want to keep the ALL the benefits that go with Marriage? Including the conceit that when two people stand before god and proclaim their love and devotion, we stand behind them.