Darwyn, have you ever wondered why there were so many banking panics (coming hand in hand with securities' market crashes and triggering pretty nasty economic recessions) in the National Banking Era in the US when England, France and Germany had remarkably stable financial systems during the same period? Why, after the crisis of 1907, one European banker declared the US "a great financial nuisance"? Yes, it was because the US lacked a central bank to ensure financial stability.
And issuing money as a loan? That's mainly the job of commercial banks. Central bank provides them with liquidity necessary for offering loans to private sector. Of course it doesn't do it for fun but to keep financial sector running seamlessly and also to influence the monetary policy and therefore the whole economy. By manipulation with the discount rate and the reserve requirements, it can provide incentives and disincentives for the commercial banks to offer loans. The discount rate used by central bank serves as a benchmark for commercial banks, because, to mention the easy case, the money they borrow from it has to be lent out at higher rate to ensure profits. In recent years, commercial banks have the liquidity almost for free since the rates charged by central banks in the West are almost negligible. In reality, discount rate is not that important, repo rate is, since central banks control the amount of currency mostly through open market repurchase agreements that affect monetary base. All in all, while FED earns interest through repo trades, it can't earn money that way, that would require constant monetary expansion - essentially an inflation Ponzi scheme. Which, if you look at the development of inflationduring past decades, is not the case.
goldfinger, monetary policy of EU is stellar in comparison to its fiscal policy, which is virtually uncoordinated and ultimately causes the biggest trouble since it undermines the base of the currency union. If there was a fiscal coordination, the differences in economic fundamentals between the member states could be mitigated, which would stabilize the whole structure. Since there is no such thing, monetary policy has to suck because there can't be no monetary policy that would accomodate all the differently performing economies that together form EU.
And TC would be probably surprised how massively rooted in microeconomics are modern macroeconomic theories because yes, microfoundations are necessary for reasonable description of economic reality.