When Filipino worker Edwin De Castro landed a position through a labour hire firm to work on a construction site in Narrabri in New South Wales, he was no doubt excited.

Upon arrival, however, De Castro and others were forced to endure 60 to 70-hour working weeks in dangerous conditions with gross underpayment of wages and made to sleep six to a bedroom on site, with another sleeping in a shipping container. For these sparse living arrangements, the workers had $250…