it was created by Congress.
they don't bother to explain what, exactly, it is doing for Joe Sixpack and Suzie Yogurt.
https://2012-2017.usaid.gov/who-we-are/usaid-history#:~:text=International%20Aid%20in%20the%201960s,created%20USAID%20by%20executive%20order
International Aid in the 1960s: An Agency is Born
In 1961, President Kennedy signed the Foreign Assistance Act into law and created USAID by executive order. Once USAID got to work, international development assistance opportunities grew tremendously. The time during the Kennedy and Johnson administrations became known as the “decade of development.”