As far as I know the US embassy in Seoul wasn’t conscripting people to take unpaid internship positions. If these students wanted to get paid they should have applied for another job:
A student in her 20s, who requested to be identified by the alias Kim Hye-jin, recalled the distress she felt as an intern for the U.S. Embassy in Seoul in 2015, during which she received neither a salary nor even a stipend for transportation and lunch.
“I had to take an additional part-time job after finishing work at the embassy at 5:30 p.m. I barely had any time for myself,” Kim told The Korea Times.
“Since I was working for its public affairs department, I was always required to take part in the department’s events in the evening. Whenever I returned home late at night, I felt so depressed for losing personal time in addition to not receiving money.”
Sometimes, Kim even spent her own money for transportation during business trips and for lunch with organization partners and she had to wait two to three months to be reimbursed.
As an intern, Kim assumed a variety of roles, from translator and photographer to event organizer. Sometimes, she also answered the phones and does basic office tasks. “I applied for the post, aware that it was unpaid. However, it made me think the system was unjust, since my job was more vital than I initially thought,” she said.
Another worker, who also requested to be identified as Han Cheol-soo, worked for the U.S. Embassy last year and underwent similar hardships. “Since my parents couldn’t afford to give me a stipend, I couldn’t help but quit the internship earlier than I had hoped,” he said. “I think such an unpaid internship policy is a stumbling block for students from poor families to get equal opportunity.” [Korea Times]
You can read more at the link.