Way back in the 1970s, I spent a couple of short spells as an unemployed layabout, one of which was ended when I took a job as a fruitpicker, making (IIRC) $2 a day, which even then wasn’t food money (I wasn’t very good at it). Fortunately, the job included some basic accommodation and all the blackberries you could eat. And, even then the whinging from employers who claimed to be unable to get enough pickers was an old story.
Now, I see Tony Abbott is pushing the same line, wanting to stop dole payments in any district where there are (claimed to be) vacant fruitpicking jobs. After four decades of this stuff, we ought by now to have some actual evidence. So, I have a few questions
First, has there ever been occasion when significant volumes of fruit have gone unpicked because of a shortage of pickers? 
Second, has there been any occasion on which demand for fruitpickers has been enough that a person with no prior experience could make substantially more than the minimum wage (currently about $15/hour). ? 
And if, as I strongly suspect, the answer to both questions is No, what does that tell us about the expectations of the whinging employers. (I suggest, a ready supply of below-minimum wage workers, available on demand when needed, and ready to be sacked the moment they are not)
fn1 Not a strike, or some particular farmer so objectionable that all ir workers quit
fn2 I know that experienced pickers can do a bit better than this, but that’s not the relevant issue here.