Considering that the word "lunch" did not come into being until the 1920's -- it was short for "luncheon" -- it is highly unlikely that Ben Franklin said any such thing.
That aside, Mr. Madison's document is a recipe for organized gridlock -- which is exactly what Iraq needs. It is designed to buffer the effects of factionalism, the thing that had killed every republic in history until Madison's time. Under Madison's architecture, the more factions you have, the better. It's not a bad way to go.
I'd heard the quote as "dinner". That some mutants of the quote use "lunch" says nothing for or against the notion that Ben Frankline said the original version (whatever it was).