California entrepreneur Eric Schiffer warned that the state's proposed billionaire wealth tax could drive some of its most successful business leaders out of California, predicting a "giant sucking sound" of entrepreneurs heading for the exits if voters approve the measure.Schiffer, chairman of family office Patriarch and CEO of Reputation Management Consultants, told FOX Business that he works with several billionaire clients, including some in California, and said many are unhappy about the proposal."I think the impact of this passing in California is a giant sucking sound of all of these en...