What happened to the wall between church and state? Our government has been in the marriage business for what, 220+ years, while religion has been in the business of marriage for over 4,000 years. I'd say religion is the sole owner of the institution of marriage and as such the determining agency of what constitutes a marriage.
Personally, since the government has destroyed the family unit with its many acts/laws/programs against that unit, government should just get out of the marriage business altogether.....no tax benefits for marriage/children/nothing.....no government forced child support....no government aid for unmarried or married pregnant women....you made it, you take care of it......this would truly make all people equal.....this would make men (and women that can't or chose not to get pregnant) equal to homosexuals that can't benefit from being married and not having children.