There's been no shortage of punditry lately concerning the bleak prospects for Malcolm Turnbull's prime ministership, which have been given another spur this week by suggestions that the Liberal Party's same-sex marriage crisis could usher it into its terminal phase.

This is increasingly being complemented by favourable commentary about Bill Shorten, such as Laurie Oakes’ assessment on Friday that his rhetoric about inequality demonstrated that "his political smarts should not be underestimated".