Comment by FilosofumRex

US finances costliest weapons (fighter jets, precision munitions, air and missile defense systems such as Iron Dome, David’s Sling, Arrow, and Iron Beam) which provides the qualitative edge of Israel’s military, while Israel’s own budget covers personnel, operations, and much of the day‑to‑day war cost.

Without US tax dollars, Israeli part of military budget would have to shrink by 50 - 60% to pay for R&D, manufacturing, testing, deploying and maintaining of US provided advanced weapon systems.