I'm a few days late on this, but here is my latest in National Review Online on the new Congressional Budget Office baseline, and what it has to say on taxes, spending, and the real cause of debt:
Here's a quick summary of where we are. The figures are expressed as a percentage of the economy (GDP), which is the conventional way to compare them over time.
50 Year Average
21% of GDP
17% of GDP
22% of GDP
19% of GDP
End of Decade
30% of GDP
18% of GDP
End of Century
40% of GDP
19% of GDP
Notice the pattern? Spending keeps going up, Up, UP as time goes on (even faster than economic growth), but taxes basically keep steady with the growth in the economy over time--they're even a little frothy.
What about if we make the TCJA and other expiring tax provisions permanent? CBO has a static score for that, and it turns out that doing so shaves about a percentage point off of revenue by the end of this decade. Instead of federal revenues being 18 percent of GDP (the historical average + 1 pp), federal revenues would instead be 17 percent of GDP (the historical average).
So much for extreme tax policy.
The extreme position is the one that leaves spending completely unchecked, and calls for tax hikes even as tax revenues are coming in well above the historical norm.