(Bloomberg) -- The world’s largest creditors should take coordinated and decisive action to address the “generational challenge” of poorer nations struggling with unmanageable debt burdens, a top US Treasury official said, aiming specific criticism at China, the biggest lender to emerging markets. Most Read from BloombergIsrael Bracing for Unprecedented Direct Iran Attack in DaysApple Plans to Overhaul Entire Mac Line With AI-Focused M4 ChipsRussian Attacks on Ukraine Stoke Fears Army Near Break