What exactly is your argument, money, non-acceptance of homosexuality, or some combination of the two?
Take this
April 2011 study from the Williams Institute.
They found there are "an estimated 3.5% of adults in the United States [who] identify as lesbian, gay, or bisexual and an estimated 0.3% of adults are transgender. This implies that there are approximately 9 million LGBT Americans..."
Now. Forty-eight per cent (48%) of hetero Americans are married and receive the tax breaks and government benefits you mentioned. If every one of the 3.5% who identify as LGBT marry, the benefits they'll receive will add just a drop in the bucket to what the hetero marrieds get already. And it also raises the question does every married couple even take all the breaks and benefits they're entitled to. Because as I'm sure you know, some couples file as "Married, Filing Separately" and they get the fewest tax breaks of all. So the financial argument is not as cut-and-dried as you'd think.
I'm inclined to think, from reading your posts, that the tax and entitlement benefit of marriage is not your deciding factor in why gays shouldn't marry. Frankly, I think you don't approve of homosexuality, period, but are trying to cloak that position with a sort of "fairness" mantle, and a fantasy that this country would be overrun with homosexual couples whose incipient marriages will bankrupt us. Whatever. Whether it's money or approval of homosexuality, yours is a pitiful position to take and your snide comment at the end doesn't make your own argument legitimate.