Why Obamatax is a tax and not a penalty...

...according to Randy Barnett:

Chief Justice John Roberts justified his re-characterization of the "penalty" in Obamacare as a "tax" on the ground that the amount involved is so small as not to be coercive. It merely provided an "incentive," like how Cash for Clunkers provided a $5,000 incentive to trade in an old car. Millions kept their old cars and effectively lost $5,000. The court's opinion implied that, if this "tax" was so high as to coerce compliance, it would then be an unconstitutional penalty.

Which brings me to the biggest difference: Congress, the Obama administration and most law professors defended the mandate as a regulation of interstate commerce under the Commerce Clause. Had this argument been accepted, future Congresses could jack up the amount of the penalty, and add prison time to boot. But a majority of the justices rejected this argument and held that the mandate was not a "proper" exercise of the commerce power. So, in the future, Congress may not punish people who fail to engage in economic activity with a high fine or jail time.

Roberts' decision made bad law in two respects. First, he claimed the power to rewrite a law by giving it a "saving construction" to uphold it, after he admitted that this was not the best reading of what the law actually said. Second, he allowed that Congress may impose an unprecedented tax on inactivity, provided that it is low enough to preserve the tax payer's "choice" to obey or pay. Both of these maneuvers made constitutional law worse, even if they did save this law in hope of avoiding political attacks on the court.

But the deal that Roberts gave constitutional conservatives was to make constitutional law better in more important ways. He agreed with the four conservative justices that the powers of Congress were limited by Article I of the Constitution; that the Supreme Court would enforce these limits; that the individual insurance mandate exceeded the powers of Congress under the Commerce Clause; that compulsion to engage in commerce was "improper" under the Necessary and Proper Clause; and that Congress could not use its spending power to coerce states into vastly expanding the Medicaid program by withholding existing funding. These are all rulings that 99 percent of law professors had argued against.

I do not praise Chief Justice Roberts for making this political deal. But neither do I want to throw away all that we won because I don't like what we lost.