Researching something else, I came across the following in State Hansard:
These proposals are gradually bringing marriage down step by step to make it equal to X relationships so that marriage has no real point. It seems to have lost its value in our society. I am not suggesting we go back to the old pre X term, which was Y, but it does not seem that we have moved a long way from that description to the proposals reflected here in virtually informal marriage. If a legal marriage and a X relationship are equal in the eyes of the law, what is the point in getting married? Marriage has traditionally been recognised as indicating the beginning of a new relationship, a new family. A marriage commences when it has been ratified by a legal marriage service in public before witnesses and, for the majority of the people in this state, before God. I am aware of the fact that the aspect of it being before God is not necessary for it to be a legal marriage. The great majority of people in this State regard marriage as a joining of two people, male and female, in the eyes of the State and, in many cases, the eyes of God.
The speaker was Fred Nile. "X" was "de facto". Y was "living in sin". This was in Parliament on 1 December 1982. See page 3607 of Hansard for the Legislative Council for that date.
Nearly 30 years later, he and his ilk sing the same song, with only a couple of phrases changed.
There is more in the Hansard for that day before and after.
I could be mistaken, but his prophesied doom to marriage does not appear to have arrived.