Taxes mostly go towards the welfare state. This is only an effective use of your money if you believe imaginary lines on a map make some people's quality of life more important than others.
"Disprovable" in the sense that's how it looks on paper, but like you may know the USA "Department of Health and Human Services" is extremely corrupted and most of it is wasted thanks to an overpriced health system. Many European countries suffer as well from corruption in this area but USA levels of corruption are still unmatched (http://epianalysis.wordpress.com/2012/07/18/usversuseurope/)
