You only really pay 0% if you make under something like 12,000 a year pre-tax. I agree that no one should pay more than 20%...but for that to happen we need to

1) Stop fighting wars
2) Stop supporting every country that has a minor problem and tell them to deal with it themselves
3) Get rid of SS, Medcaid, Medicare and adobt a healthcare plan that works. If we had that people could save more money and not be screwed by medical expense when they are seniors.
4) Cut Military/Defense/Weapons costs. All the money we spend on that could easily do things like Pay for everyone to go to college for free and do the health care plan that works. Also the defense and intelligence doesn't deserve the money that get if they can't even tell if Iraq has WMD(granted that is largely Bush's fault for scewing the facts anyways).

So many problems and no one is going to do a thing about it. It wouldn't be an easy transition but it is one that seems almost needed for the long run.

Here are projects under the current system

http://www.heritage.org/research/fea...harts_P/p5.cfm

I suggest everyone take a look at all the different graphs on that site as they are quite interesting.