India, May 9 -- The long-simmering feud between billionaires Bill Gates and Elon Musk intensified this week as Gates accused Musk of endangering the world's poorest populations by driving severe cuts to U.S. foreign aid.

In a pointed interview with the Financial Times, Gates said Musk's role in dismantling the U.S. Agency for International Development under the Trump administration had led to the collapse of critical global health and humanitarian programs.

Gates, the Microsoft co-founder and longtime philanthropist, denounced Musk's attacks on USAID as "misguided and reckless," citing canceled grants to hospitals in Africa and massive disruptions to food and medical supply chains.

The aid agency, which disbursed over $42 billion in 2023...