Point one:
> I also think taxes are needed.
The cypherpunks would tend to disagree with you. Remember, taxes aren't inherent to any system of monetary value, they're just laws that say "pay us x or go to jail".
Point two:
"During the financial crisis, many on the left expressed concern about a deflationary spiral. I don't claim any economic expertise, but the concern seemed valid."
Deflationary spirals are an economic theory, and have never yet been seen in the wild.
The only "problems caused by extreme economic freedom" are the groans and reactions of centralized monetary control as liberty is restored to the people.