A proposed 5% one-time tax on billionaires' fortunes could pass by vote in California this November; this is how much music icon Beyoncé would have to pay. Read the full story on Forbes: Subscribe to FORBES: https://www.youtube.com/user/Forbes?sub_confirmation=1 Fuel your success with Forbes. Gain unlimited access to premium journalism, including breaking news, groundbreaking in-depth reported stories, daily digests and more. Plus, members get a front-row seat at members-only events with