"PISA tests are only able to test the testable in reading, mathematics and problem solving.."

So, in other words, an IQ test?

If the PISA scores really are just a proxy for mean national IQ, then Gillard's attempts to raise Australia's PISA ranking is doomed.

There are three ways to influence national mean IQ levels. The first is to improve nutrition and education, but vitally important though they are, they suffer from diminishing returns as populations bump up against their genetic ceilings, as is probably already the case in Australia. The second way is to promote eugenic policies, or at least policies to mitigate the dysgenic trends that are typical of modern developed societies, but they tend to be ethically questionable and politically unfeasible. The third method is to adopt a highly selective immigration system working in favour of those ethnic groups with high mean IQs, but this appears to be unlikely given Australia's ideological aversion to any sort of discriminatory immigration policy.

A noble aspiration, albeit an election cycle of two off
But where is the money coming from?