I honestly don't understand where most tax dollars go in the U.S. I'm in Korea at the moment and the tax burden is overall very light when compared to the States, but the level of service you receive is absolutely tremendous for the most part.
Example, if you make over around $85,000 USD, you fall into the maximum tax bracket, which is 35%. Most people pay around 25%. As a foreigner, I can also pay an alternative 17.5% instead.
There's also a 10% surtax at all income levels. So I can really get by with about 18.5% income tax (and there's all kinds of easy deductions).