If that is your only criticism (was it?), you have no beef with Rand Paul since he has called for cutting off welfare to BOTH Israel in the Arabs.
Israel probably does not need our money; they may have benefited from us providing some technology, but it has worked both ways.
We use money to buy favors and influence. With a true, solvent friend you don’t need to do that.
We’re the ones who are not solvent. But if we were, and were handing out money for fun , Israel would be the last friend I cut off, preceded by Great Britain and Canada and Australia.