Going to post some selected replies, again, trying to keep the "political" part of the equation out, while answering with the moral and social part.
Dangerous Waters there, UncleBob. Not paying taxes is in violation of the Social Contract as ratified in the Constitution. They are merely enforcing said contract when the IRS man comes a-knocking.
My issue isn't with paying taxes, per say. It's the amount of taxes, the way the responsibilities of taxes are distributed and the way the benefits of the taxes are distributed.
But you're not being held at gunpoint, it's tax and it's taken to provide for all the services that make our society function. It's just life and it's nothing to be hung up about.
That's the thing about taxes - you are being held at gun point. What happens when you don't pay your taxes? Uncle Sam doesn't shrug his shoulders and say "Well, let's take more from the next guy."
Private charity, community help and localization of general assistance to the populous is far from barbaric.
We have a winner.

I can vote out a corrupt public official. I can't do anything about a corrupt private charity worker.
*You* cannot vote a public official out of office. You can vote against a public official though.
Meanwhile, if a private charity is not using your donations in a way that you feel fits with your moral obligations and social duties, you can easily stop donating to that charity and find (or start) one that does. Additionally, you may have legal recourse against the charity if they have illegally used your donations.
On the other hand, if the federal government is abusing your "donations", well, shut up and take it for another four years (and *hope* you can then vote someone in who doesn't abuse the power).