Why are political leaders so blatantly unwilling to make the hard choices needed to confront the existential threat of climate change?

One reason, of course, is that their main focus is simply to be re-elected. Voters don’t like hearing that they may be required to alter their lifestyles, and so politicians won’t tell them that, even if they know they should. 

But another reason could be that these elected officials are getting some bad advice, especially from economists, whom they are far more likely to listen to than scientists...
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Scientists say severe climate change is now the greatest threat to humanity. Extreme weather is expected to upend lives and livelihoods, intensifying wildfires, and pushing ecosystems towards collapse as ocean heat waves savage coral reefs. The threats are far-reaching and widespread.

So what effect would you expect this to have on the economy in coming decades? It may surprise you, but most economic models predict climate change will just be a blip, with a minor impact on gross domestic product (GDP).

Heating the planet beyond 3℃ is extraordinarily dangerous. The last time Earth was that warm was three million years ago, when there was almost no ice and seas were 20 metres higher. 

But economic models predict even this level of heat to have very mild impacts on global GDP per capita by century’s end. Most predict a hit of around 1% to 7%, while the most pessimistic modelling suggests GDP shrinking by 23%.

In these models, some countries are completely unaffected by climate change. Others even benefit. For most countries, the damage is small enough to be offset by technological growth. 

This, it is becoming clear, is a failure of the modelling. To make these models, economists reach into the past to model damage from weather. 

But severe climate change would be a global shock that is wholly outside our experience. Inevitably, models can’t come close to capturing the upheavals climate change could cause in markets fundamental to human life, such as agriculture.
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This article by Timothy Neal, a senior lecturer in Economics at the Institute for Climate Risk and Response, UNSW Sydney, is truly frightening. The political, governmental, and economic systems currently in place, which control the world, are wholly incapable of responding to the threat we face. 

FULL ESSAY -- https://theconversation.com/have-some-economists-severely-underestimated-the-financial-hit-from-climate-change-recent-evidence-suggests-yes-214579

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