I understand that that "2.3 billion" number makes for shocking value and therefore a great headline, supporting the narrative that they're looking to construct, but the way the raw data is presented actively obfuscates readers from exploring the data and forming their own interpretations.
When I see a dataset with a 4 million percent increase YOY, I would probably classify that as an outlier, not as the representative value I report for the whole dataset.
Edit: That's not to say their narrative is wrong (that is, CEOs may absolutely be overpaid), just that the way they presented it feels misleading to me.