Mary Choi is a type of female Korean worker, probably in the hogwan business. They usually get fewer benefits from the Korean employer than the foreign teacher (So confront the employer but it will do no good.). They ususlly live in their parents' home (one of Mary's earlier criticisms). The boss often hires them part-time so they get no holiday pay and often no pension money. They are expected to do extra phoning to parents and extra unpaid hours for no extra pay.
Rather than studying to get a good paying professional job they do one degree in a low level private university and major in English. This is similar to all the young women training to be a secretary in past years..quick, easy and low paying. The foreign EFL teachers have taken their skills, degrees and yes courage overseas to look for opportunity. The timid ones stayed home. Mary and those like her can sell their skills overseas too but they are afraid (humble). They stay home and resent and nurse a jealousy. The business world is more and more an international market. Why resent? You want warm rice? Join in, go get it.