One in seven people in their 20s earn less than W1 million a month, according to National Health Insurance data.

Out of 2.4 million employed people in their 20s, 15 percent or 360,000 people -- 150,000 men and 210,000 women -- earn less than W1 million (US$1=W1,154).

Most of them are employed part-time or on fixed-term contracts.

Only 220,000 people in the age group earn W2 million or more per month. Since there are 1.75 million four-year university graduates in the group, this means only one in eight 20-somethings with university degree has a job that pays a decent income.