Straw man argument. Bull. You are the one who demanded specific authorization in the Constitution. In fact the constitutional issue was explicitly raised in connection with the Louisiana Purchase and was specifically addressed by none other than President Thomas Jefferson the drafter of the Declaration of Independance. Heis position was that the benefits of such a purchase far outweighed an possible constitutional violation.
Thus it is hardly a straw man argument. It represents the fundemental dispute regarding exactly what the role of the federal government should be. Further it demonstrates that the issue is nothing new, but has been around since the inception of the nation.
Your attempt to treat the Louisiana purchase as a straw man is nothing more than an attempt to side step an argument for which you lack a pat answer.
Coincident with the purchase was the Lewis and Clark expidition. It was also derided at the time as a waste of tax payer dollars.If you don't think the government has the authority to fund a trip to the moon, you can not beleive that the same government had the authority to fund the Lewis and Clark expidition.
So tell me was Jefferson a traitor to the Constitution, a hypocrite, or a man of vision?