Because we want to live. They murdered 90 people in waco a while back for failure to pay a $200 tax. I'd say that means your life is worth a little more than $2 to FedGov.
Another question..........What does this say about the IRS's special tax courts, which enjoy a domain outside of the normal judicial system which has that constitutional thingy?
Times will be mighty wierd for the attorneys at the IRS.