" taxes are the only practical weapon the common voter has against government overreach, and the Constitution was written with this fundamental truth firmly in mind."
Hardly, the common man was given zero authority with regard to taxes in the constitution. The constitution gave that power to congress. The constitution wasn't written to empower the common man, the constitution derives it's power from the people. It's government that was empowered by the constitution.
The Constitution left almost all authority in the hands of the people. Ever since it was signed, the government it empowered has been working on changing that and it's been very very successful. The biggest example is the people's only explicitly stated and protected power in the form of a jury and jury nullification. The government could write laws all day long and if it couldn't convince 12 people in your community that what you did was actually wrong (regardless of any "law" it violated) that jury has the power to find you "not guilty."
How about we start focusing on taking away the governments ability to punish without a criminal convinction (no more government issued CIVIL punishments) and the courts decision that not only do they not need to tell a jury about their right to nullify unjust laws and their application on a case by case basis but that they can actually LIE to juries. Juries are the people's check on all three branches, including the judicial. It is not the place of the judicial to limit their authority!