Rich people will be fine, I suspect. The urgency will hit when rich people in powerful nations feel it, by which time poor people in a lot of nations will have

Rich people will be fine, I suspect. The urgency will hit when rich people in powerful nations feel it, by which time poor people in a lot of nations will have had a pretty miserable time. I suspect that the steps then taken will involve protecting rich people's lifestyles, rather than really doing anything about the problem, while poor people's lifestyles adapt to the new conditions (and indeed, many of them die).