> The "never let a crisis go to waste" crowd
In my experience there's no group better at that, and with the best platform, than politicians.
However, you're not wrong in your statement that there are other groups trying to push their own fringe agendas that just end up scaring the normal/middle majority. But, politics also has the power to guide the narrative incredibly better than it has been, and to properly address said fringe agendas.
> A lot of the rhetoric and policy proposals related to climate change seem designed to foist a reduced standard of living on the middle and lower classes in Western countries.
The problem is that's the reality, so the hard work that politicians just don't want to do because it requires collaboration with "the dreaded other side" is determining the framing and choice of what standards of living can be maintained and what needs to change and by how much.
However, if the worlds politicans are actually good judges of the tolerances of society and they've correctly decided that society can't tolerate any decline in lifestyle, then there was no way to win anyway so might as well "get what I can when I can before the music stops".