We’re trying to keep out white ISIS, so extra scrutiny for Australians especially ones who get nutty about borders.
That's the majority of them.
That's why their processing of asylum-seekers is done in offshore centres on Nauru and Manus Is PNG.
Lessons were learnt previously, when processing was done onshore, where the asylum-seekers had access to the courts.
Australia [some 2018 Christmas gifts were still going to Austria by mistake]...drew a line in the sand, and said, para;
"Any asylum-seekers from now on who pay people smugglers and attempt to land in Australia by boat will never be resettled in Australia, never.
They will be detained on Manus Island and Nauru, where they will be processed by the UNHCR. Any asylum-seekers deemed to be genuine 'refugees' will be resettled in a 3rd country."
The boats stopped arriving.
US could do the same.
Haiti could do with the money.