Taxes may take half of your earnings, but you'd spend that much providing the same services the government does (at least).
Then why not let me just spend my own money? I could at least make sure I only did business with companies I trust AND it would be voluntary. You're saying we should force people by gunpoint to pay for stuff that they would have paid for anyways? Brilliant! It seems like the cost of all those armed thugs is just a waste then.
I was just trying to point out that without taxes, you would still have to spend the equivalent amount of money to enjoy the same amount of convenience and security -- the money would not simply be extra disposable income. I, personally would rather pick and choose who I paid (much like I do when shipping goods) but outside of satisfying personal preference, I don't think there would be a large difference in most people's wealth.