Talk or rorting the system applies to an absolute minimum of employers and workers. Are the Government going to stop all driving because a small percentage speed or drive inebriated?
Some years ago a senior Immigration official told me the 457 Visa system was being seriously rorted. He claimed (from memory) 1.7% of employers were investigated and just under 1% were prosecuted or faced administrative action.
If we assume a whopping 5% of 457 Visa holders are rorting our system and should be repatriated, that currently leaves 90,000 trade and professionally qualified workers employed in their trade or profession, productively working in Australia, for Australians.
The latest changes to the skilled temporary worker system are intended to significantly reduce (and presumably eliminate) that number of productive workers and increase Government income from a raft of Visa and other fees.
I suspect it will be impossible now or even over the next decade, to find an additional 90,000 Australian professional and trade qualified and experienced workers, in addition to supplying the additional numbers required to meet increased labour market demands.
Apprentice numbers are down 40% in a decade. Entry to essential professional qualifications at University (doctors, nurses etc) are also significantly down.
Changes to the skilled temporary worker visa system was solely a short sighted political decision to appease the Unions and the left and center left voters.
Our national skills deficit will get worse, impacting building, manufacturing, health and other services and further erode our value added/manufactured exports. Expect to pay far more for trade and professional services unless the National and State Governments invest far, far more into promoting and providing quality vocational training at a cost all Australians can afford.