Jobs Australians Wont Do?

Okay so I'm watching the Colbert Report, very funny as always, but something came up, the often repeated phrase "they do the jobs Americans wont" and it reminded me of something that is said in Australia a fair bit as well, the problem is it's total bullshit.

It's not that Australians (and Americans) wont do the jobs commonly done by illegal immigrants, backpackers, and new immigrants, it's that they can't do those jobs, it's just not possible. Now let me explain, speaking from experience from where I live backpackers often come in and pick up seasonal work that use to go to local workers, they work for cheaper as they don't have to worry about paying the rent, putting food on the table, making sure their kids have something to wear, no, they just want some extra spending money on their holiday, so farms employee these workers at less then what it would cost for an Australian worker, great for the farm in the short term, horrible for the local economy.

The same can be said of other types of migrant workers all over the world, they are paid less then what the local people would expect for the same job, because they have lower over-heads, often times working for cash in hand ($100 cash in hand is worth more then $150 paid correctly, after tax, super, etc is taken out), this in turn drives down what farms are willing to pay, why should they pay local workers what they need in order to live if they can get workers for cheaper? This leads to the expression "they do the jobs XYZ wont do", which is patently false.

Now I'm not against migrants picking up work (well I am against backpackers, fuck off you cunts, you're either here working, in which case you should be paying tax, or here on holiday, stop trying to have it both), I just think that in order for it to be fair for local workers, and migrants the governments of the world need to pull their thumbs out and sort out this problem, by enforcing minimum wage, by enforcing fair treatment, by stopping the exploitation of migrant workers; doing that will not only help the migrant workers, but the local workers as well, because pay rates will go back to where they were, allowing them to take jobs they currently can't because the pay isn't enough to live on.