Adelson has bought Netanyahu for one single purpose: to place a stooge of his in the White House. It is an aim that any other multi-billionaire cannot even dream of.
For anyone just arrived from the planet Mars, here is a brief summary of Israel’s dependence on the US: it gets from it the bulk of its heavy arms and does not have to pay for them, it can depend on it to veto all UN Security Council resolutions that condemn Israel’s deeds and misdeeds, it receives from it billions of dollars every year although the Israeli economy is flourishing.
There is another benefit which is often overlooked. Since the world believes that both houses of the US Congress are totally subservient to Israel, all countries pay Israel for access to Congress. One has to bribe the doorkeeper to get in.