Low Birth Rate
The Korea Times has recently written that the birth rate in Korea is exceptionally low. The government has now passed a bill allowing all fathers three months leave from work if their wives gave birth.
The economic problems associated with the low birth rate is the same for Koreans as it has and will be for U.S. baby boomers. With a sudden drop in population, millions of people will have to be supported in 60 or 70 years by a tiny fraction of the population.
Also "current job insecurity will further deteriorate because a large number of schools will inevitably close. Women might be conscripted to make up for shortages of military manpower. Various pension funds will be depleted, threatening the welfare system in its infant stage. The nation will suddenly become an aged society. Retired people will be compelled to return to work sites."
"The Third World: Staying Poor and Growing Old" by Randy McDonald