Serious answers would be appreciated.
One thing that would work would be a United States lottery. The last data I remember seeing was how Texas profited 4 billion in 2004 alone from it's state lottery. If we had a United States lottery in every state and made the winnings 100 percent tax free, than gave like 10 to 20 percent of the revenue to each state it would bring in Billions if not hundreds of billion each year.