Taxation is theft. "But who will build the roads" argument is really old and dumb, people are not some stupid monkeys who can't figure out things if no one guides them, there's nothing that can not be done privately and through voluntary cooperation (which is the same as privately). Roads, military, science and so on - all of it can and is done privately around the world. Government is exactly why Bitcoin was invented - you can't trust people with power and believe that they will do as they've promised, and even well-meaning leaders do stupid mistakes that cost billions. Just like Bitcoin have decentralized economy, some day people will decentralize power to the point when every individual will be independent from others.
A lot of people are still working for jobs related to the goverment, therefore getting paid by the goverment. Those money come from our taxes. I don't know what percentage of jobs nowadays are government based jobs, but i bet there is a lot of them.
Here is Australia, the tax is also as high as the US, but I am happy to pay because i know it will benefit my family and my future.