Although great store is now placed on leaders in our democracy, their high turnover reminds us, as Professor Tiffen once wrote, of their very disposability. Heroes one day, condemned and forgotten the next.

Since losing federal office in 2007 and with the recent changes the Liberals have had six leaders - about one every two years.

The Nationals, who used to boast of their stability, have succumbed to the same trends. Since 2007 they have had five leaders, and the recently displaced leader, Barnaby Joyce, lasted less than twelve months.

Labor, federally, has done better, having just two leaders, since they fell from office in 2013, but they did have the previous trauma of the Rudd-Gillard-Rudd experience which divided the government and the party.

While this turnover of leaders is not a new phenomenon, it has accelerated in recent times for several reasons.

Foremost of these is the presidential style of modern electioneering. The focus today, as we all just witnessed during the campaign, is almost wholly on the leader whether the prime minister or leader of the opposition - in the debates, interviews, parliament, campaigns and in terms of their own personal attributes.

This trend has been enhanced by declining party loyalties and memberships. Voters identify more and more with a leader and their personalities, their beliefs, their life story, their manner, their family, and their style than with a party and its values. The leader, not the party, has become the personification of political choice.

The pervasiveness of the media and modern technology has facilitated this cult of the leader. Leaders can be followed and seen everywhere, thus largely replacing local candidates and campaigning.

Consequently, leaders are under more scrutiny and pressure than ever before, not just for what they say, but how they look, smile and gesture and for every utterance made in the past regardless of context or time.

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Heightening the dominance of the leader in office has been the centralisation of administrative and political power in modern government. Leaders now control all aspects of government, attend every announcement, and thus take credit or blame for every success and every mistake. We no longer have a Liberal or a Labor government, but a Morrison or Albanese one.

Given such pressures it is unsurprising that leaders stumble and make mistakes and soon fall from grace, as oscillating opinion polls show. Every mistake is amplified and subject to merciless criticism from the media and unforgiving disappointment from electorate who have had such heightened and unrealistic expectations of what leaders can do and unappreciative of the burdens leaders now bear and the constraints within which they have to work.

One consequence of this cult of the leader is that is easy to blame the leader when things go wrong, and thus also so easy to fix - just change the leader and all will be well. How readily parties do this we saw on election night when colleagues and commentators were so quick to condemn Morrison for the election results and the subsequent quick replacement by a new leadership team.

How convenient is this for all concerned. It allows senior party members and officials to abrogate any responsibility for the government's defeat and mistakes. More importantly, parties avoid confronting more fundamental problems, such as the parties' growing factionalism, policy temerity, declining membership, and ideological confusion - issues that have been simmering for a decade and were the real reasons for the coalitions' failure this time round. This also allows the electorate and the media to quickly switch attention to the new leader.

All this is saying that no-one should expect the new Liberal and National leadership teams, regardless of your views about some of the personalities, to alone be able to restore their parties' political fortunes overnight. Nor should these parties do nothing and patiently wait for the electoral pendulum to swing back their way. That is too simplistic, too easy and ignores the inherent challenges facing all political parties in modern day Australian politics today. It needs a more thorough rethink about the roles and structures of parties and their beliefs.