The only way Australian rates will not go up after the election is if the people reelect enough of the current people. If a new party wins, or more opposition people win, then one month after, like you predict, the rates will go up, and the out going party will be to blame for overspending.

I do not know how the Australian Government or elections are set up, but most elected governments have at least two different sides. Their versions of Republicans and Democrats.