I’ve always thought it’d be useful to pursue just as a backstop: you set a carbon tax to whatever the cost of sucking the co2 back out is, and then you have net zero.
I guess it’d have to be introduced slowly to 1. Give them time to develop lower costs before bankrupting literally everyone and 2. Reduce the shock of painfully high carbon tax, and give everyone time to jump for cheaper alternatives. But it feels like the closest to a proper solution that I can imagine.