I know some Korean's and they have never mentioned anything like that. Of course they live in Europe now
What you describe is the way wal-street works. Not so much if your a electrician or engineer? So might be similar?
My take and that of demographers - S. Korea has the same problem as Japan, China, etc. If you live in a condo with little space, both adults need to work to pay for things, and kids add no economic value (ie no free farm labor), then humans aren't stupid and have fewer of them.
Were honestly not that far behind them in this country.
Still doesn't explain there current affairs?