Your world of no taxes leads very quickly to : no road networks, no free education, no legal system to protect rights, no law enforcement, no street lighting, no opportunities for those born without to improve their chances. In fact it sounds like the Wild Wild West except someone shot the sheriff. Only the strongest survive.
In a truly libertarian society with no court system or laws enforced by government, the rich would quickly realize unless they spend vast sums of money protecting themselves and their property the poor would quickly take it from them since they would outnumber them.
Considering the US has a trade surplus in energy, perhaps foreign countries should tariff those products.It would be very easy for countries to shore up their trade imbalance by purchasing US oil & LNG.
Edit:typo
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