The NAPLAN test in Australia has been an issue of debate ever since it was introduced in 2008. The government uses them to gather information and publishing them into league tables.
The NAPLAN in my opinion does not accurately reflect schools' capabilities. During my immersion, the school I went to had students coming from poor countries and have not had any formal form of education. Therefore, the students would not be able to answer questions on literacy and numeracy, the areas targeted by the NAPLAN. It does not take into account the history of the child and the demographics of the schools.
The government is also forcing teachers to teach on the curriculum, ignoring equally important subjects like Drama, Music, Art and Sport. Each child needs a balance of cabbages and roses to function. When one outweighs the other, the child is left in a dark zone of ignorance. Ignorance is not bliss. Being ignorant is denying knowledge.
Let's have an education revolution that would actually work.