People ask why the blue collar working class are deserting the ALP. I've heard a few (including Mark Latham & Graham Richardson) discuss this.
You have a group of people here who are economically a bit left of centre, but culturally/socially right of centre. As they always have, they feel disdained by the silver spoon Libs who look down their nose at them as a bunch of white-trash bludgers and welfare recipients. While at the same time they feel the sneer of the inner city left of the Greens and modern ALP-left, who look down their nose at them as uncultured bogans, as they don't share the same interests. I don't think they really want to vote for the Coalition, because they still don't trust a group of silver spoon lawyers and business big wigs, but feel alienated by the inner-city dominated ALP, who have got bogged down fighting the Greens to their left flank on the politics of gender, sexuality and racial matters.
And it's interesting, for the first decade to decade and a half of it's existence, One Nation mainly was attracting disillusioned National Party voters who felt the National Party had abandoned them to be under the thumb of the silver spoon fed lawyers and business big wigs of the Libs. But now the ALP appears to be suffering the same, with a fracturing of a chunk of their blue collar vote also going to One Nation.
I have extended family that live in the Newcastle hinterland seat of Hunter. One of the most staunchly working class, blue collar ALP seats in NSW, if not the country. Joel Fitzgibbon had a 21% swing against him and the L-NP Coalition had a 2.4% swing against them on Primary votes. The swing went entirely to One Nation, who picked up 21-22% of the primary vote (basically equaling the Coalition). Fitzgibbon held on for the ALP, as he had a massive margin. But he now only attracts 36% of the primary vote. And One Nation very nearly went into the two party preferred run off ahead of the Coalition. Fitzgibbon's two Party preferred margin is now inside marginal territory, from being one of the safest seats in the country.
The irony was that One Nation ran a young, local miner & farmer, who is a staunch CFMEU member (I wonder whether this has escaped the attention of ACTU head, Sally Mcmanus)! And it seems the strategy worked. Perhaps the Latham factor of a prominent ex-ALP man going to One Nation and campaigning heavily in regional NSW during the federal election (after winning a NSW state seat himself) also had a baring. But nonetheless it is an interesting demographic trend.
In my home state of Tasmania. One Nation has never had a strong presence. But in the NW Coast electorate of Braddon, One Nation polled considerably stronger than the Greens (The Greens having a long history of polling well in Tasmania) in the house of reps. Particularly around the declining industrial heartland of Burnie. These same blue collar voters on the NW Coast seemingly voting strongly for independent Senator, Jacquie Lambie, on their Senate paper. Which looks to have got her across the line for a return to Parliament. Jacquie may be a bit rough around the edges and unconventional. But this part of the electorate likely feels she's one of them, or at least, speaks to/for them.