The Americans get some ROI in the form of technology sharing. Israelis are pretty bright and and their well-funded labs churn out some cutting-edge stuff. Unlike their neighbours who plateaued with the suicide belt. Unfortunately the Russians benefit as much or more, from American investment in Israel. For example Syria needs a new air force from time to time. During the never-ending hostilities the Arabs have lost 1250 aircraft....the IAF lost 28.
