If they continue to present stupid taxation policies to the...

If they continue to present stupid taxation policies to the election such as:

* retrospective removal of negative gearing

* retrospective removal of the 50% CGT discount concession

to raise revenue, however assume in their costings that high income earners would not seek to house their investments in future through companies in order to minimise the impact of the tax hike, then yes it is likely their vote has peaked.