That argument that deep austerity is needed is bogus, however. For years, economists and climate scientists and even skeptics have been arguing that whether or not the problem exists (okay, well, now they usually admit it exists), there is an entire new economic sector that can be opened up to private businesses - climate change mitigation. And that is a net *positive* to the global economy, for the economy as well as through the development of new technology. The fact that if bad things are averted we also gain economically from avoiding them is icing on the cake. The downside? All the major fossil fuel industries are looking at a "co-opt or die" scenario. Cui bono?
You can do this without extreme taxation or austerity, IF you start reasonably soon (in the next few years would be good - we passed ideal a few years back). It's the fear and exaggeration of the costs, largely put out by fossil industry interests, that is delaying change.
So if you really do just tune out and think of nutbar extremists when you consider the costs of this, what you're selecting is guaranteed to be the most expensive path through the next few decades. If you're *lucky*, the cost of that will be minimal as thousands of climate scientists are proven to be wrong. But if you're wrong, well.. That's when that choice gets ugly for your kids.
How much are you willing to be that the climate scientists and their peer-review system are so totally corrupt and incompetent that they are completely wrong? Your future, and your kids and grandkids futures? Hey... Go for it. Maybe modern climate science is the equivalent of catastrophe geology up against Alfred Wegener. But... That's a huge bet to make against the professionals.