This is compared to no global warming at all far in the future. Meaning that we will still be richer than today, just not as rich as if we magically could sustain this economic growth without increasing greenhouse gasses in the atmosphere.

I think the IPCC reports estimates are more realistic.

> The study by Australian scientists suggests average per person GDP across the globe will be reduced by 16% even if warming is kept to 2C above pre-industrial levels.

This has to be taken with a massive grain of salt with such results...

On a side note, ultimately the population has also to decrease to hope to reach any sort of sustainability.