The dispute emerged Tuesday after Lee questioned whether requiring young people to apply for their first month's pension contribution would unfairly exclude those who were unaware of the program or unable to navigate the application process.
Under the initiative, scheduled to take effect on Jan. 1, 2027, the government will cover one month of National Pension Service (NPS) contributions for eligible young people, allowing them to establish an early contribution record and potentially increase their retirement benefits.
The program will initially cover those born in 2009 who turn 18 next year. They can apply between the ages of 18 and 26, with the government providing an estimated 42,000 won ($30) toward their first month's contribution.
The Ministry of Health and Welfare has earmarked 18.9 billion won for the program in its proposed 2027 budget. Advance applications began on Oct. 1.
The subsidy is intended to address a longstanding gap in Korea's pension system. Young people who remain outside the workforce while studying, serving in the military or preparing for employment often begin contributing later, reducing the number of years credited toward their eventual retirement benefits.
Establishing an initial contribution record at 18 could also allow beneficiaries to make retrospective payments for certain periods when they were unable to contribute, potentially increasing their future pensions.
But the program has exposed a dilemma: Whether the government should automatically extend the benefit to eligible young people, potentially increasing public expenditure, or retain an application system that could leave some of the intended beneficiaries behind.
Lee raised the issue during a Cabinet meeting at Cheong Wa Dae on Tuesday, arguing that an application-based system could produce substantive inequality by favoring people who have sufficient time, information and resources to seek government assistance.
He also questioned whether it was appropriate for the government to design a program around the expectation that some eligible citizens would never claim the benefit.
Lawmakers interviewed by AJP offered sharply different assessments of the policy.
Rep. Yoo Sang-bum of the opposition People Power Party (PPP) questioned whether government-funded contributions were consistent with the principles underpinning the National Pension system.
"The basic principle of the National Pension is that individuals pay their own contributions and receive benefits after reaching retirement age," Yoo told AJP.
"Fundamentally undermining that principle in the name of supporting young people amounts to populism. Can those who have been paying into the pension system accept that?"
The National Pension is primarily a contributory system in which retirement benefits are linked to contribution records, although employers share the cost for salaried workers and the government already subsidizes certain low-income contributors.
Rep. Choi Bo-yoon, another PPP lawmaker and a member of the National Assembly's Health and Welfare Committee, emphasized the need to balance support for younger generations with fiscal discipline.
"Both addressing gaps in pension coverage among young people and maintaining the soundness of public finances are important policy considerations," Choi told AJP.
"We are carefully examining the optimal approach that would provide meaningful assistance to the younger generation while remaining financially sustainable."
Rep. Kim Yoon of the ruling Democratic Party suggested a compromise that would preserve the application system while protecting those who fail to claim the benefit before the age limit.
"One possible approach would be to retain the application-based system as the basic framework, while allowing those who have not applied by the age of 27 to receive credit for one month of pension coverage even at a later date," Kim told AJP.
Such an arrangement could address Lee's concerns about unequal access without necessarily requiring the government to make immediate payments on behalf of every eligible young person.
The sharpest criticism came from Rep. Ahn Sang-hoon of the PPP, a former presidential senior secretary for social affairs who serves on the National Assembly's special committee on pension reform.
"With a hole of more than 1,500 trillion won in pension finances, all they can think about is handing out money. This is textbook populism," Ahn told AJP.
"It's laughable to see the person who poured pension fund money into the domestic stock market, leaving it stuck buying at the top, now pretending to worry about fiscal responsibility."
Ahn's characterization of a massive financial shortfall comes amid continuing concerns over the long-term sustainability of Korea's pension system.
The NPS reported that its accumulated fund reserves stood at 1,684.2 trillion won at the end of July 2026. However, the National Assembly Budget Office projected in June that the fund could be depleted in 2069 under its baseline assumptions, despite reforms designed to strengthen the system's finances.
The proposed subsidy would be financed through the government budget, rather than through direct withdrawals from the pension fund's investment assets.
The broader pension system is already undergoing reform. Contribution rates began rising this year from their previous level of 9 percent and are scheduled to reach 13 percent by 2033, reflecting mounting pressure from Korea's rapidly aging population and shrinking workforce.
The new subsidy therefore raises questions extending beyond the relatively small amount involved in the first month's contribution.
"It is questionable for the government to dictate policy to the National Pension Service. One possible alternative would be to provide differentiated subsidies to young people based on their income levels," Yang Joon-suk, an economics professor at the Catholic University of Korea, told AJP.
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