Late last month a few big brains gathered in a Tel Aviv office building in order to try to figure out the secret of the Israeli economy’s resilience during the longest and costliest war in the country’s history. How is it possible that the economy is solid, even though the war has already cost more than 200 billion shekels (over $60 billion) in direct expenditures, to which hundreds of billions more will have to be added in the years ahead to cover a soaring defense budget and to service debts?