At a recent meeting, Lee reportedly pointed to economic burdens and institutional disadvantages behind young people delaying marriage and childbirth, and ordered a fix to rules that penalize marriage.

The issue is the so-called 'marriage penalty'—the concern that joint spousal taxation or income thresholds for various supports can make marrying disadvantageous, and that such cases should be reduced.

The government treats the birthrate as a top priority, but crafting effective design under constraints of funding and fairness remains a challenge. Analysts say tax, housing and childcare support must be linked organically.

For Chinese families in Korea too, marriage- and childbirth-related rules shape household finances. Whether support design for multicultural and foreign families is refined in tandem is a point of interest.