Think about those last few sentences.
Voluntary taxation only. Immediately, all creditors would cut off the federal government. Nobody is going to loan money to a government that relies on donations. So, implement that moronic policy and instantly the federal government is insolvent. What happens with a suddenly insolvent federal government that cannot back its currency? Poof goes that government.
Meanwhile, states don't have the power to create or back their own currency. Splat goes economic activity - literally, all of it, on the world stage - reduced to bartering.
You wanna listen to someone fear-monger about Biden raising taxes on the upper crust - an upper crust that repeatedly got tax cuts from the GOP leading to our existing deficits - from a guy who voted for a party with a platform position that would without exaggeration end the United States of America?
I could go on, but basically, the LP platform sounds like a fifth grader's Lord of the Flies fantasy. It boils down to "government should basically do just about nothing, and people should be able to do as they please." It read like anarchy lite.
Clue: that ain't utopia. Government steps out like that,
someone else steps in, and that
someone else is going to be your newer meaner government. Communes don't work except on the smallest of scales.