Interesting theory, but as common to you Israel haters, so much horses**t.
Israel's GNP is somewhere near $103B, American aid is approximately 2-3%.
If Israel does what you say because of American aid, it's a continuation of a Hanukkah type miracle.
Give the Jews 3 Billion dollars and they make it work like 103 Billion.
The moral of the story. Give all your money to a Jew to invest.
With all the controversy surrounding the alleged U.S. pressure on Israel to abandon Gaza and support elections among the Palestinians, I think it is safe to say that Israel would eliminate every penny of this U.S. aid if it could possibly do so.