It's not likely that the song has currency in Oz, but, during the 1930s depression, the dole was given to "susso" workers, ie, workers receiving sustenance pay. Two major projects involving susso workers were construction of "The Great Ocean Road" west along Victoria's coast west from Airey's Inlet (a great scenic drive and recently in the news when part of the Lochard Gorge pillars collapsed due to wave action; it's an extremely "high energy" coastline) and "The Boulevarde" along the Yarra River at Kew (a suburb of Melbourne); The Boulevarde used to be a favoured parking spot for courting couples when I was a lad. Alas, I had no car.

In Oz slang for the first half of the 20th C, a dollar was the alternative name for "five bob" (ie, five shillings); I'll have to do a bit of researching to find out the amount susso workers got per diem but it might have been five bob.

Cheers, Rowan