Not quite. A zero tax rate collects zero percent of everything, which is nothing. A rate of 100% collects 100% of nothing. What you should be noticing is that for all other tax rates, the revenue (collected) crosses the curve at two points. It's possible for a tax rate of 10% to produce the same revenue as a rate of 50% or even 70%, and that
concept is the importance of the Laffer curve. The actual shape of the curve is unknown, an varies from time to time. Our present position on the curve is also unknown, unless we go to either 100% or 0%. It is simply a graphic illustration of a concept.
Regarding "tax and spend' v. "pie in the sky", the distinctions have pretty well blurred, don't you think? Or, are you really trying to make the point that other than liberals, no on understands the necessity of taxes? Now, there was a time when you could safely call the Republican party the party of "Tax and Spend." In those bygone days, you could have characterized the Democrats at the party of "Borrow and Spend." I don't believe the distinctions exist any longer, though there is a difference in where the spending is directed.