As reported in the Korea Herald there is a wage gap between the larger enterprises and the SMEs. 
"“The country’s labor market is divided into the first league of large corporations and regular jobs and the second league of SMEs and irregular jobs,” said Bae Kyu-shik, a researcher at the Korea Labor Institute, a state-run think tank."

From Business Insider
Since the global financial crisis, high youth unemployment has been a problem across the world. But even though the issue is widespread, the causes and the effects vary greatly within each country. Business Insider took a closer look at the economic and geopolitical factors that have led to continued high youth unemployment in 47 countries, as well as some of the major regional and global trends. Read the full article here...

Globally, 73 million youth are registered unemployed. Considering how many aren’t registered, this number is actually much higher. 620 million are currently not in employment, education or training (NEET), according to the World Bank.
Meanwhile, with 600 million young slated to enter the job market in the next decade – with only 200 million jobs awaiting them – the youth unemployment crisis is not projected to improve anytime soon.  Read the full article here