Herman Cain Steals 999 Tax Plan Idea From Sim City?

It's seems like a strange coincidence, but when a guy like Herman Cain quotes a random bit from a Pokemon movie I don't doubt he stole the 999 idea from Sim City. Sim City 4 had a tax plan just like Cain's where there was 9% on income, corporate, and retail or something or another. I've never played it myself. What's next? Turning prisons into Zelda dungeons?