You probably say, "But I have no idle money!" Haven't you? Examine your current account. Any credit balance over and above the minimum necessary to cover your immediate needs—even if it's only a few pounds—is idle money. This is all you have to do to make it work. Simply decide the minimum balance you need to meet your regularly recurring commitments. Then give your bank manager this standing instruction: that whenever your balance exceeds that minimum he shall take the surplus and buy War Savings in your name.