If the marriage rate for normal couples was the same as the rate for homosexual couples (about 5% of that population), there would simply not be enough tax revenue at any level to fund the massive apparatus of federal, state and local programs. The two main sources of net personal revenue are married men with SAHMs and “power couples” earning 75k+ each.
It would behoove all the gay marriage boosters to think the math of making marriage have cooties through a bit more. Probably not going to happen though. Everywhere that gay marriage is legalized country-wide, the heterosexual marriage rates take a dive. No matter what people assert in a survey or on facebook memes, they do think marriage gets gay cooties on it if gay marriage is made national.
And the income earned by people cohabiting or living in civil unions is nowhere as high as what married households bring in. It turns out that it’s not just a piece of paper and it’s also not something that can be between else but a man and a woman.
Funny how that works. Natural, normal marriage is what you have to have in order to support a robust welfare state. Without it, you can’t fund much of anything.