One unrealistic part about the poor family in the movie is that, there is no way a family of four healthy adults can be that poor in S.Korea (unless they have a large debt payment).
If all four of them worked 40hrs/wk doing a minimum wage job ($7/hr in S.Korea), it puts them around $59k/yr, which is above the median household income.
If all four of them worked 40hrs/wk doing a minimum wage job ($7/hr in S.Korea), it puts them around $59k/yr, which is above the median household income.