South Korea\'s financial regulator and antitrust watchdog are not upholding their duty as the guardians of the market economy because their staff members often join private companies after retirement, the head of a local think tank said Tuesday. Kim Kwang-doo, the head of the Institute for the Future of State, said the country\'s family-controlled conglomerates, known as chaebol, are to blame for the situation, noting officials of the Fair Trade Commission (FTC) and the Financial Supervisory Service (FSS) often join large companies or law firms after retirement.