LOCAL workers building China's $1billion nickel mine in Papua New Guinea are being treated like slaves and paid just $4 a day, according to PNG Labour Secretary David Tibu, who is threatening to shut the site down. Following a surprise visit to the site in Madang province, Mr Tibu said health and safety conditions at the project were far below international standards. Mr Tibu said workers were sometimes being paid for overtime with tins of fish rather than with money, that canteen arrangements were not fit for pigs and that toilet facilities were so inadequate and public that employees instead...