If that were actually his legislative agenda, that would be interesting. But I don't see him pushing that in terms of how he votes.
The government already does not interfere with the private, religious aspects of marriage. The Catholic Church can define marriage however it wants, and the state has no say in it, which is why you can't get a same-sex marriage in a Catholic church.
What's being debated is who should be recognized as married for official purposes (5th amendment rights, tax filing, survivor benefits, inheritance in the absence of a will, etc.). On that question, Amash supports the Defense Of Marriage Act, which says that the government should recognize only opposite-sex marriages, and not recognize same-sex marriages. If he opposed DOMA, and instead introduced legislation to abolish all government recognition of marriage, I'd give him kudos for that!
"What's being debated is who should be recognized as married for official purposes"
It shouldn't make a difference whether or not someone is married... you know, equal protection under the law. The solution to things like survivor benefits and the others you mentioned (and you're right, Amash doesn't mention this solution) is to simply have private contracts that people decide upon themselves.
"If he opposed DOMA, and instead introduced legislation to abolish all government recognition of marriage, I'd give him kudos for that!"
Seriously, find a single Tea Party candidate that ACTUALLY has that view on marriage. That IS the view I have on marriage, it is the libertarian view, and there isn't a single Tea Party candidate that supports that view.
The problem generally is that there's more to Libertarianism than fiscal conservatism, and Tea Party interests tend to be just as selectively fiscally conservative as the battered-brand mainstream Republicans once they're placed in power. It' s a gimmick for Republicans who don't want to be called Republicans but be elected by socially conservative Republicans that call themselves Libertarian :p
The government already does not interfere with the private, religious aspects of marriage. The Catholic Church can define marriage however it wants, and the state has no say in it, which is why you can't get a same-sex marriage in a Catholic church.
What's being debated is who should be recognized as married for official purposes (5th amendment rights, tax filing, survivor benefits, inheritance in the absence of a will, etc.). On that question, Amash supports the Defense Of Marriage Act, which says that the government should recognize only opposite-sex marriages, and not recognize same-sex marriages. If he opposed DOMA, and instead introduced legislation to abolish all government recognition of marriage, I'd give him kudos for that!