I think minimum wage hit our labour market very negatively last year and will more negatively effect this year especially in a small and medium sized business.
Minimum wage this year is raising up 8,350won excluding paid-weekly-leave allowance(주휴수당) which should be paid if a part-timer work for more than 15-hours a week. Last year it was 7,530won and it's more than 10% increase, 10.9%.
Once I calculated monthly salary payment, yes it's more than 1.74mil.won.(8,350*209hours)
You can split the part-timers, likely less than 15 hours work for a week to save your labour cost.
Once your part-timer claim it to the court because you violate it, you're going into jail for 3 years or 20mil.won penalty according to the law.
And also if you didn't make a labour contract, you can be punished in 5mil.won penalty.
More idea or questions, please send me an email to firstname.lastname@example.org