Foreign aid is never the kind of altruistic giving you and I might do. There is always a quid pro quo.
Certainly depends on what you mean about US interests. I'm a US citizen and am very pleased with what they have done enhancing trade, feeding people, addressing malaria and TB, education, sanitation, and lots more. It's easy to connect this with promoting democracy, paving the way for Pax Americana, and other things which are pro-American.
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While its still up: "USAID AND THE POLISH DECADE" https://pdf.usaid.gov/pdf_docs/pdabs562.pdf
>Could Poland have done what they did without Western assistance asks Zbigniew Brzezinski, Polish-born national security adviser under President Jimmy Carter and author. - "I'd have to say no."
Result is absolutely highest US approval of all European nations. 91% positive with miniscule 3% negative in 2022 https://www.pewresearch.org/global/2022/06/22/international-...
Clearly wasted money ...