Imagine being famous for saying something you never said seven centuries after your death.  What has come to be known as Occam's razor — "entities are not to be multiplied beyond necessity" — has been attributed to English philosopher and theologian William of Occam (1287-1347), though he never used those exact words in his writing.  According to conceptually.org,

Occam's razor (also known as the 'law of parsimony') is a philosophical tool for 'shaving off' unlikely explanations. Essentially, when faced with competing explanations for the same phenomenon, the simplest is likely the correct one.

Occam's principle has been reformulated many times before and after Occam himself presented it, beginning with Aristotle ("Nature operates in the shortest way possible"), but the value of parsimonious explanations in some form has been preserved up to the present as an invaluable tool of explanation.  Einstein is credited with expressing it as "Everything should be made as simple as possible, but no simpler."  Da Vinci recommended mimicking Nature in whose works "nothing is wanting, and nothing is superfluous."  And since WW II, in keeping with the principle itself, KISS ("Keep it simple, stupid") has become the modern world's acronym for it.

The theory describes a desirable goal in any undertaking — everything necessary, nothing superfluous.  With this in mind, how should we evaluate the Federal Reserve System?  Is it a streamlined agency purporting to provide the American economy with all its monetary needs?  Did it replace a flawed system that was causing havoc?  Was it an improvement over anything the economy has ever had?  Since an economy includes people who work and trade, was there a public outcry for monetary reform?