The White House used the front page of Monday's Washington Post to cashier a Cabinet member. A story headlined "Bush to Change Economic Team" said: "One senior administration official said Treasury Secretary John W. Snow can stay as long as he wants, provided it is not very long." Obviously the office will need filling before "very long." The president should fill it with Alan Greenspan. He has headed the Federal Reserve System under four presidents — since August 1987. Now he is needed elsewhere. Having been in Washington most of the 30 years since he became chairman of President Gerald...