Announcing this yesterday, the Centre of Overseas Labour under the Ministry of Labour, Invalids and Social Affairs, said that since 2004, about 71,730 Vietnamese had gone to work in the RoKunder the Employment Permit System.
By 2011, up to 57% of them had overstayed after their contracts had expired. The rate had fallen by 30% in late 2012, when about 17,000 workers were reported to be staying on illegally.
Luong Duc Long, deputy director of the centre, said that Vietnam must do more to cut the numbers or it would serious affect opportunities for new workers.
Since early this year, more than 5,280 Vietnamese workers have been selected by the RoK's enterprises. Of these, more than 3,820 are first-time participants, while the rest are renewing their contracts.
The RoK's Ministry of Employment and Labour has warned that it would stop accepting Vietnamese workers "at any time" as the rate of runaways is double that of 15 other countries supplying workers.
In 2012, the RoK actually stopped receiving workers from Vietnam, but the ban has since been lifted.
Long claimed that Vietnamese workers "lacked awareness" of the problem and that the higher pay scales were so tempting.
The income of a worker in Vietnam is VND3-5 million a month (US$141-235), compared to the RoK's incomes of between US$1,000-1,500.
Vietnamese who sign contracts with the RoK's enterprises for four years can earn a total of up to US$50,000 for their whole term.
Long said illegal workers could be caught and expelled whenever found. They would not be allowed to return for at least five years and could receive fines of VND100 million (US$4,710) from Vietnam authorities.
