BeReal; a pity you appear unable to to take your own advice: 457 Visas only if we sit on our behinds not lifting a finger to ensure the Legislation is adhered to as it is written.
The rules and references are all here if you have not already read them:
https://www.google.com.au/webhp?sourceid=chrome-instant&rlz=1C1CHZL_enAU722AU722&ion=1&espv=2&ie=UTF-8#q=457%20visas
And as Capt Tim Carrol wrote:
Capt. Tim Canoll, a Delta pilot and president of the ALPA. “It takes a very motivated person to meet the physical, emotional and intellectual challenge of becoming a pilot, and that same motivated person does the math looking at what it takes and the return on investment, and it just doesn’t add up,” particularly when training costs alone can reach $150,000.
Exactly the same applies here: when the number of applicants is assessed with the numbers required plus the numbers successfully completing training it `ain't' going to solve any shortage let alone a worldwide shortage.