当在当地无法找到合适的技术工人时，457签证为澳大利亚工业提供了全球劳工供应的渠道。

The 457 visa program benefits Australian industry by providing access to the global supply of workers when suitably skilled workers cannot be found locally.

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即使像澳大利亚和加拿大这样率先实施“积分制度”以优先考虑技术工人的国家也削减其劳工签证。

EvenAustraliaandCanada, which pioneered the "points system" to give preference to skilled workers, have cut back on work permits.

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