Fiscal policy is often a lagging indicator of the window. Trillion-dollar deficits were once political suicide; the window shifted, and now they are standard procedure.
The window dictates your social safety. Expressing an opinion outside the window (even if factually true) leads to social ostracization. You police your own speech to stay inside.
"The Door-in-the-Face": Radicals propose something insane (The Door) so that the slightly less insane thing (The Compromise) seems reasonable.
The Shift: Look at the speed of legalization (Weed, Sports Gambling). These ideas spent 50 years as "Criminal" and 5 years shifting to "Taxable Revenue."
Frame Awareness: Recognize that "Normal" is not a moral truth; it is a temporary coordinate. Do not confuse "Socially Acceptable" with "Factually Correct."