in the Act on the Protection, etc. of Fixed-term and Part-time Workers as they are completely excluded by the current severance pay system, annual paid leave, weekly leave and the unlimited term contract system of the Act on the Protection, etc. of Fixed-term and Part-time Workers. In addition, the Commission also recommended the guarantee of social insurance benefits such as employment insurance, health insurance and national pension. [6] Improvement in Gender Wage Gap (List of Issues 16) 22. Korea is the country with the largest gender wage gap among OECD member countries. Since 2000, where the OECD has started presenting relevant statistical information, the Republic of Korea has been placed in the first place with the biggest gender wage gap. The average gender wage gap among OECD member countries, calculated based on the median wage among full-time male workers, was 15% in 2014 while the figure was 37% for the Republic of Korea. The rate has decreased by 3%p from 40% in 2004. However, countries with less gender wage gap than Korea such as the U.K., Switzerland, Belgium, and Iceland have shown decrease in the gap by 6%p for the past ten years. Japan, with the third highest gender wage gap among OECD nations, also showed decrease by 5%p from 2004. 23. Korea’s gender wage gap reflects the hierarchical structure in the labor market where more women are concentrated in low-wage positions than their male counterparts. According to an article ‘Scale and Current Situation of Irregular Workers: Additional Survey in the Economically Active Population Survey’ by the National Statistical Office (Yoo-seon Kim, March 2016), in 2016, monthly wage for women was 1,760,000 won and for men was 2,920,000 won while monthly wage for irregular workers was 1,510,000 won and regular workers was 3,110,000 won. Supposing that male regular worker’s monthly wage 3,500,000 won as 100, male irregular workers received only 52.6% (1,840,000 won), female regular workers 68% (2,380,000 won), and female irregular workers 35.4% (1,240,000 won), showing wide disparity according to the employment type.