Government didn't have the numbers prior to the election, good chance this occurs again if the win the election.
Polling currently says they'll likely win with a reduced majority, Hung Parliament even a possibility.
How accurate are the polls compared to outcome though?
Chalmers currently says tax on realised gains and no indexing is non negotiable with indexing left open for future governments to apply or not apply at later dates.
As it stands, if it gets up, then yes, in time you will be impacted.