Taxes will eventually become a voluntary process, with the possible exception of real estate - the one physical thing that does not move easily and has computable value. The US has a jump-start on the practice, in that 65 percent of local school funds come from real estate taxes - a practice Europeans consider odd and ill advised. But wait until that's all there is left to tax, when the rest of the things we buy and sell come from everywhere, anywhere, and nowhere.