Spending is the problem, but there is something about the revenue that's worth noting. It has gone up but not as fast as it used to. Prior to 2000, it approximately doubled every ten years, and that trend has existed essentially since WWII. I'm not entirely sure what the cause of that is. I don't think it's tax rates being too low, because rates were lower in the '80s, and revenue still doubled. Obviously the Great Recession hit revenue very hard, but even before that, we weren't on a pace to double revenue.