Separating the genuines from the economics takes time, trained staff, overseas criminal checks, intelligence and liaison with relevant ethnic groups ('Al Fangi isn't an Afghani because his accent's wrong and he doesn't know what colour the boat shed in Kabul is
'). All very boring stuff that costs money, something the current government has been loathe to commit to border protection, particularly when it attracts little publicity.
Despite media stunts and telly shows, the fact remains that the border agencies have been chronically understaffed and under-resourced for years. The High Court has decided that shoving the problem out the door hasn't worked and the government's just got to deal with it.
They can hardly argue that the current High Court is anti Labor
.
The Prime Minister challenging the High Court Judge.
She can whine all she likes, the High Court is not answerable to her or anyone else. They're the High Court, the last avenue of appeal. Any Australian (including the PM) can take a matter to the High Court but they have to wear the decision.
In a 6-1 decision it seems petty to attack one of the six. The whole thing is very uncool.