I’d suggest your viewpoint is highly likely to be one of privilege, not from one of poverty.
A poverty viewpoint is indeed relevant - there are so many objectively poor people who will consume more to fill their currently unmet needs as soon as they can afford to (so the only way to prevent this consumption increase is to ensure that they stay in poverty); and it should be expected that people will reduce consumption en masse only when they can't afford the current consumption (no matter if caused by prices skyrocketing, or an impactful carbon/fuel tax, or simply declining income), and they will be very unhappy about it as they will treat this reduction as a shift from privilege to poverty.
And a realistic threat of being prevented to escape from poverty or being forced to shift from privilege to poverty IMHO would be considered by people as an existential threat comparable to global warming (I mean, for many people the main threat of global warming is the expected decrease in their living standards caused by it) and a much stronger motivation to act because, unlike climate change, that threat would be (a) closer in time, (b) more certain, and (c) with a clear way to fight against it - voting out a politician or rioting in the streets won't fix climate change (you'd need global coordination for that), but it definitely could suffice to kill any local carbon tax or government imposed reduction of consumption.
TL;DR the way humans behave, it should be expected that they will fight against a decrease in consumption much harder than they would fight against climate change.
All this is going to be insane energy and also resource intensive and totally impossible just by saving some resource here and there. A massive expansion of clean energy sources is whats needed, anything else just wont work.