you need to legalised prostitution so that it can be considered a taxable job , then at least by bringing them in they can be taxed on their tricks , and they are also obligated to get regular health checks as in NZ and Japan
But back to the main story , I agree its probably overdue to cut down on unskilled migrants , who are taking work from unskilled Australians .
Also need to cut down on the false student visa program