If a young Korean woman wants to have a few kids, without living in grueling poverty - is that possible with a husband who's not in the top 1% of earners? If not - then ignoring the 99% may be a want-to-be-mom's least bad strategy. :(
Are you native Korean or deeply tied to the culture? Else, this reads like silly Internet hyperbole. You have clowned yourself with this post. Literally, you think that only 1% of Korea can afford to raise multiple children? In truth, many choose to hyper-concentrate their attention and resources on a single child. As a result, they do have replacement rate for their population. However, lots of Koreans outside of Seoul also choose to have more than one child because the economic pressures are much lower.