The fact that we have deincentivized marriage is a huge issue. Married couples are usually wealthier but everything that used to push people to do that has been roadblocked by govt.
Feel like you are putting the cart before the horse here. It's not like the government gives you a house and 40 acres for getting married.
Plus, there's the whole " allowed to be next to your loved one in the hospital" thing that's overlooked until it's needed.
So, no 40 acres, but there are benefits beyond two incomes.