[esspem]

Have you ever seen a working liberal democracy before US? :) That kind of argument doesn't work for proving impossibility.

Life without violence from government (taxes) is certainly possible. In 19th century US government spendings were only 2% from GDP. Such amount can be collected with charity without force.

[anigbrowl]

Of course, in the 19th century the continental US wasn't densely settled and shooting the natives was considered reasonable under many circumstances. Get real, any country in the world that found itself with vast tracts of fertile land more or less free for the taking would have a fabulous GDP - budget ratio too.