“The individual mandate, however, asserts authority over citizens that have done nothing; they’re merely declining to purchase health insurance. This regulation of inactivity cannot find a constitutional warrant in either the Commerce Clause, the Necessary and Proper Clause, or Congress’s taxing power. Such legislation is not ‘necessary’ to regulating interstate commerce in that it violates the Supreme Court’s distinction between economic activity (which often falls under congressional power as currently interpreted) and non-economic activity (which, to date, never has), it is not ‘proper’ in that it commandeers citizens into an undesired economic transaction.”