President Park Geun-hye said Thursday her drive to reform public organizations will focus not only on reducing their debts and ending lax management but also overhauling their duties to help them focus on core respnsibilities. "Besdes debt reduction and (ending) lax management, we have to focus on increasing productivity," Park said during a joint policy briefing by the finance ministry, the fair trade commission and the financial services commission. "We have to carry out an all-out review of the functions of public institutions in phases and get them to focus on core duties."    Park also said that public corporations should sell off their assets for debt repayment, if necessary, and asked officials to make sure that those assets are sold for the right prices as they are public properties purchased with taxpayer money.