Yesterday, Afghan President Hamid Karzai alleged that the United States and the Taliban are “working in concert to convince Afghans that violence will worsen if most foreign troops leave.” His accusation exposes a strange irony. Karzai not only supports U.S. forces in Afghanistan after 2014, but also disparages that presence to evade his own failings.

Since 2001, senior U.S. officials have tethered our military might to the sick man of Central Asia. In 2004, President George W. Bush pledged America’s “ironclad commitment” to help Karzai’s country succeed. In 2010, President Obama made clear that the U.S. role in Afghanistan “is a long-term partnership.”

President Karzai codified those pledges last May by concluding the Enduring Strategic Partnership Agreement between the Islamic Republic of Afghanistan and the United States of America. Despite his history of hindering U.S.-backed anti-corruption investigations, denouncing the international community, and claiming the U.S. ferried Taliban to the north in order to spread violence, he eagerly signed an Agreement that commits the U.S. government to Afghanistan’s future. It provided for the possibility of a U.S. troop presence until 2024, and a long-term framework for training Afghan security forces and targeting al Qaeda.

Washington’s devotion to nation building still holds fast despite Karzai’s inability to fulfill its lofty expectations. As former U.S. ambassador to Kabul Karl W. Eikenberry bluntly warned his superiors in November 2009, Karzai “is not an adequate strategic partner.”

Certainly, the United States is not blameless for Afghanistan’s downward spiral—it took responsibility back in 2001 to rebuild the war-ravaged country and then shifted its attention and resources in 2003 to invade and occupy Iraq. Yet, the endemically corrupt Karzai regime and its band of thugs and cronies are also culpable.

Ample reporting on Afghan corruption need not be repeated here. More to the point, Karzai fails to appreciate the way in which his poor governance vindicates insurgent propaganda and drives many Afghans to fight. A widespread perception of the central government’s massive corruption delegitimizes the state and inspires the sense of injustice that makes the Taliban appear as an effective alternative. Apart from Karzai himself, Afghan police are notorious for perpetrating crimes they are supposed to be stopping, such as corruption, theft, kidnapping, murder, and child abuse. Meanwhile, the Afghan army, long hailed as the mission’s shining success story, is rife with factionalism and patronage networks that could splinter the institution along political and ethnic lines. Foreign policy planners in Washington overlooked the second- and third-order consequences of their attempts to build a strong central government that wields a monopoly on the legitimate use of force.

As the Democratic majority staff of the Senate Foreign Relations Committee admitted two years ago, “Foreign aid, when misspent, can fuel corruption, distort labor and goods markets, undermine the host government’s ability to exert control over resources, and contribute to insecurity.” (Emphasis mine.]

Perversely, the corruption of the Afghan central government and the failures of the foreign-led nation-building project feed off one another in disturbing symbiosis. The Washington Post hasreported that foreign military and development spending provide roughly 97 percent of Afghanistan’s gross domestic product, fomenting fears that withdrawal will push the Afghan economy into depression. The alternative to popping that foreign aid bubble, some argue, would be to commit several hundred thousand troops and decades of attention, resources, and patience to transform Afghanistan’s deeply divided society into a stable, non-corrupt, electoral democracy. Of course, such success would hardly be guaranteed and assumes we possess the local knowledge as well as the cultural and religious legitimacy to operate indefinitely in a country notoriously suspicious of outsiders and largely devoid of central authority.

Over twelve years of nation-building has had little success in creating an economically viable Afghan state, much less a self-sustaining Afghan security force. Indeed, nation building has propped up an erratic and unreliable regime whose behavior feeds the insurgency’s momentum.

Policymakers must reject the flawed premise on which their policies rest. They must overcome their tendency to overestimate the strategic importance of a small, underdeveloped country to the narrower and more achievable goals of disrupting terrorist networks and preserving U.S. national security.