Moving the Overton Window requires two groups ... those standing outside the window pulling it in that direction, and those standing inside the wind pushing it in that direction.
And a crucial element is, of course, Shock Doctrine. If there is a shock that opens the possibility for a substantial institutional reform, it will tend to come from those options that are already seen as being on the table - so given that we know that the current level of targets under "serious" consideration guarantees a sequence of very hard shocks, getting an option as being seen as on the table even if an option is not seen as being a "serious possibility" is well worth doing. I've been accused of being a Marxist, yet while Harpo's my favourite, it's Groucho I'm always quoting. Odd, that.
And a crucial element is, of course, Shock Doctrine.
supplied, as instrument of last resort, by Mother Nature... ~"When an inner situation is not made conscious, it appears outside as fate." Karl Jung~