Why does Israel need the money? They have one of the worlds best trained and equipped armies in the world. They have state of the art technology and they are fighting an irregular gerillas armed with rpg and home made rockets.
The IDF doesn't want to risk the lives of their own soldiers, so they prefer to sacrifice thousands of children instead. Sending in a ground force of occupiers would likely minimize civilian deaths, but it would lead to many more Israeli soldiers losing their lives. That's why they prefer artillery attacks. Palestinian children are expendable compared to mandatory Israeli conscripts.
That's how you know that even the Israelis don't agree with this war. This would be like if Bush hesitated to invade Afghanistan because of how much shit would hit the fan when coffins started coming back and Americans started demanding to know why US soldiers should be dying for the sake of...well at that point it actually just was straight up a militarized manhunt for one guy so...