Baek
I hope you are not doing your PhD here in Korea? The private universities are degree factories. That is well known. Don't you read the Korean Times or Korean Herald? All my Korean teacher friends agree and tell me "Oh that is a very low grade university. They operate for profit." I know as I have taught at several universities here. Students get passed even if they don't come to class, do no homework, miss mid-terms and finals. It is called processing not education. I have nothing more to add. Your tone is agressive. Take some responsibility for conditions here. It is immature to always blame foreigners. The Chinese are to blame, the Japanese are to blame, the Americans are to blame and now the ESL teachers are to blame. Who issues the visa to the poorly educated or alcoholic ESL teacher? Who checks them out? The Korean Immigration Department of course. Did you not know? Blame them.
P.S. You are mistaken if you think all foreign teachers get a return ticket to their home country. Violation of contracts is widespread. Again, read the newspapers articles written by Koreans. Schools here are famous for not paying pension money to Koreans and foreigners. I call it thieft.