I'm all in favor of many things mentioned here - flat tax, federal sales tax instead of income tax, less govt, privatizing programs where you can. But anyone here who thinks the common individual taxpayer will be much better off financially is kidding themselves.
Take away the tax breaks / govt subsidies and everything goes up. Perhaps that gallon of milk without subsides would be $6. Perhaps without tax breaks to oil companies that gallon of gas goes up to $4 (would have been $5 but the taxes we pay go away also.)
Then there are things that can't go away - the military, the basic 3 branches of govt, the court system, etc.
Maybe there are things people don't want to see go away - like federal highway money (imagine paying a toll on every road), nasa's plan to go to mars, whatever.
Many programs exist to support people who cannot support themselves to "promote the general welfare". They might be privatized and you might be able to opt out if you don't need it but is the general welfare of all citizens still being met?
I wish reality was as simple as we sometimes make things out.