The KTU is trying to kick native English teachers out of Korean classrooms:

A union of liberal teachers has called on education authorities to remove all ― if not reduce the number of ― native English teachers from elementary schools in Seoul.

According to the Korean Teachers and Education Workers Union (KTU) Wednesday, its Seoul office representatives will soon meet their counterparts from the Seoul Metropolitan Office of Education (SMOE) to discuss the issue.

“There have been opinions that the quality of some native English teachers’ teaching skills is low, which increases Korean teachers’ workload,” a KTU official reportedly said. “They can be replaced by Korean teachers, given that what they teach is elementary level English.”

In April 2018, the SMOE announced measures to improve the quality of English education in public schools. As part of the reform, the office decided to provide native English teachers to all 557 elementary schools in the city.

Korea Times

You can read more at the link.

I am no fan of the KTU which was banned by the prior Park Geun-hye administration due to its anti-Park government and pro-North Korean agenda that led to teacher firings.  ROK Heads may also remember that the KTU has a long history of teaching anti-Americanism in the classroom as well.

With that all said, on this issue I can understand what the KTU is trying to do. If it gets rid of the native-English teachers that opens up hundreds of jobs for Koreans. The kids English education may suffer, but from a union perspective that is probably a low priority to them.