>I expect the inequality debate to play out in a similar fashion. Many economists may agree with Piketty.

Whilst "many" economists most surely do agree with Piketty's data, it is closer to 50-50 than the 98% found in climate science.

Additionally, the number of economists who agree with Piketty's data but disagree with him over it's implications (that's the important part) will be smaller still.