Why would you assume we get those things because we pay taxes? By your logic if we paid 100% we'd be in Star Trek by now. Heck we even saw first hand what a government run system looks like ( USSR and its satellites states) and it ain't pretty.
You do realize that the internet that we're using to carry out with this discussion was created by a United States taxpayer funded program, right? It's no Star Trek, but let's face it, reality isn't as quick as science fiction.
Don't get me wrong, I live in the United States and I don't like a lot of things taxes pay for, like wars. I'd love to be able to dictate precisely where my tax dollars went, but unfortunately, I don't have that luxury. My point is that while it's not the most efficient way of creating things, government programs have created some pretty awesome things.