The big difference with the U.S. is that we spy on "our friends" on our own behalf. If even a fraction of the things I've read about the Pollard case is true, then a substantial amount of the information he obtained for Israel was passed along to the Soviet Union and therefore had no inherent value to Israel.
$3 billion doesn't come close to paying for that kind of damage.
Pollard was an information broker--Israel was trading on its relationship of trust with the US in exchange for favors from Russia (and others).
I'm sure it won't be long now before the Pollard apologists show up and start calling everyone an anti-Semite.
More inportant than the actual information this traitor SOLD is that foreign intel services could see how the information was gathered, processed, and presented. He basically gave away the recipe for the cake along with the cake.