Whatever happened to the doctrine that laws passed by a sitting Congress can’t obligate a future Congress?
I know of no such limitation. The Clinton semiauto and normal cap magazine ban lasted 10 years until it sunset.
But there is that pesky Article 1. Section 9, Para 7 thingy. Appropriations can only be made in accordance with law. People do not work for free very long. Obamacare may be stillborn, but the IRS will still collect the penalty (I meant tax) until it is abolished.