Would be surprised if any of these young guys are claiming asylum - once they enter the country they will merge into the black economy - cash in hand jobs like most plumbers, builders....and several others or end up in your local chinese (with their nationality, perhaps afghani, pakistani, indian or persian - as an example these illegals are rife in several areas in London - doesn't take a rocket scientist to find them and yet immigration control don't do enough once they are in the country.
As for Australia - plenty much we can learn from them, however they certainly don't have a channel tunnel to deal with - that makes a significant difference. Assuming we arm our border control with the appropriate powers to remove + the right number of resources - expect that cost to be passed back down to us (personally, I would be happy to pay additional tax if required).