Gender earnings gap in Korea highest in OECD Korea has the highest proportion of women among OECD countries considered underpaid. It also has the widest gender pay gap in the grouping. The OECD defines “low pay” as earning less than two-thirds of the gross median earnings of all full-time workers. In the latest report by the OECD, released on Monday, 35.3 percent of Korean women earned less than t