When they so-called 'target the interest rate', what they're doing is controlling the money supply via the interest rate. The interest rate is only an intermediary instrument.
Milton FriedmanThe price works so well, so efficiently, that we are not aware of it most of the time.
Milton FriedmanNobody spends somebody else's money as carefully as he spends his own. Nobody uses somebody else's resources as carefully as he uses his own. So if you want efficiency and effectiveness, if you want knowledge to be properly utilized, you have to do it through the means of private property.
Milton Friedman