I never said the Supreme Court is always right.
In the one case you did mention as supporting your view of the Taxing and Spending Clause, United States v. Butler, the Court took the broad view of that clause in spite of striking down the specific law in question. Butler actually supports my view.
Actually, the case is known for being self contradictory. Roberts stated that...
"The act invades the reserved rights of the states. It is a statutory plan to regulate and control agricultural production, a matter beyond the powers delegated to the federal government. The tax, the appropriation of the funds raised, and the direction for their disbursement, are but parts of the plan. They are but means to an
unconstitutional end."
Up until this time, the spending clause was regarded as restricted by the specifically delegated constitutional powers of Congress. So this is one of those times where the Supreme Court was "wrong."
Specifically limiting the power of Congress means nothing if they can simply jump through a loophole to get by these limits. It is blatantly obvious that this supreme court (and liberal justices and legislators after them), ignored the express intent of the framers in order to advance their liberal agenda.