That's the title of an excellent rundown exploring that question by Jerry Roberts and Phil Trounstine, former high-profile political editors at the San Francisco Chronicle and San Jose Mercury-News who now blog at Calbuzz.
First on their list of "six key factors that have made California impossible to govern"? Prop. 13. If you've been looking for a handy way of understanding where the dross came from in the Golden State, this is it.