NATO's top official took issue on Sunday with Afghanistan's sluggish forward progress, placing blame more on the country's weak leadership than on the Taliban-led insurgency. "Afghan leadership is not some distant aspiration -- it's something that we need as soon as possible and on which we must insist," NATO Secretary-General Jaap de Hoop Scheffer wrote in an opinion piece published in Sunday's Washington Post. De Hoop Scheffer said the basic problem in Afghanistan is not too much Taliban but the country has too little central control. The longer it takes to see progress, he said, the longer the military operation remains in place at a "real cost in lives." "But we have paid enough, in blood and treasure, to demand that the Afghan government take more concrete and vigorous action to root out corruption and increase efficiency, even where that means difficult political choices," Scheffer said. De Hoop Scheffer wrote that while NATO is obliged to keep ramping up the military operation, force alone cannot solve Afghanistan's problems. However, NATO also needs to have a more cohesive approach, De Hoop Scheffer said, adding that the operations are still too much of a patchwork. "We should have more common approaches to our efforts, including fewer geographic restrictions on where forces can go in support of each other," De Hoop Scheffer wrote. De Hoop Scheffer said leaders from the NATO member country's will meet in France and Germany to mark the 60th anniversary of its founding, saying the meeting presents "an opportunity for alliance leaders to discuss the way forward."