As the owner of both a sales & marketing organization and an insurance agency, I have access to a lot of demographic data. Guess what - Arizona's wealthiest zip code isn't in Scottsdale, or even Paradise Valley - it's in the Arrowhead Lakes area of Glendale!
Of course, every jealous Scottsdale resident will say "everything west of I-17 is ghetto," but we know they only say that because they're envious that they can't afford the huge houses in Arrowhead Lakes. Just like they bash California, only because they can't afford to live there, and are stuck in Scottsdale for life, pretending to be rich.
Incidentally, the 2nd wealthiest is the Lakeshore Drive area of Tempe. Still not Scottsdale.