the US has different rules on such management to Aus. Here Its only ever been, according to the legislation governing the RBA, in extreme circumstances that politics can over-ride RBA decisions.
I can't imagine a scenario where that would be required, but there it is.
MMT may eventually be required. I don't know how a nation could afford it other than the one example of Norway. if only our pollies had such foresight as to retain ownership of the gas. royalties are no substitute for ownership and massive profits.