When you are donating to charity, you are using your first amendment rights and targeting the people you want to help or the charity that you think needs your money. When you send money through taxation, you know that at least 1/3 of that money will be wasted and tied up in government red tape. Government hires people for too much money and then wastes your money with communist and fascist paperwork and idealogical agendas.
Modern "Money" is a construct of government, a way to create a higher level of economic activity than barter. As such, govt actually creates demand for money through taxation, which it then spends back into the economy. Modern taxes are payable only with "Money". W/o govt and taxes, the whole idea of money would be a non-sequiter. In exchange for that higher level of economic activity, we pay taxes. And within the concept of egalitarian democracy in a constitutional republic, the representatives of the people decide how taxes are levied.
From my own POV, the current crop of anti-tax ravers are idiots, because federal income taxes are at their lowest of any time since WW2, and because we gain more from paying them than we ever lose in doing so.
The other side of it is that we've abandoned many of the mechanisms that helped send money from the top down, like unions & highly progressive income taxes, things that help us maintain social cohesion & a thriving middle class. OTOH, we've strengthened the mechanisms that send money to the top- low top tier taxes, free trade & international labor arbitrage, & reduced financial constraints on lending.
All modern democracies engage in income redistribution to some degree, simply as a mechanism of self defense for the middle class, which basically wouldn't exist w/o it, nor would many of the things we take for granted, like clean air & water, safe food & drugs, national security, and security in our homes & possessions. We'd be like much of the third world, where that simply doesn't happen, largely because of a very skewed income distribution & lack of effective taxation for those who receive the lion's share of income.
