Ugh. This study is worthless. It's like saying, "CEOs in new York get paid more than CEOs in South Dakota! They should get paid the same because they have the same title! New York CEO pay is way out of line!"
Did you know that Boeing 747 Airliner salesmen get paid more than car salesmen? That aircraft mechanics are paid more than auto mechanics?
CEOs in the US are paid more because they are paid on commission. And US companies make more money than other countries.
I absolutely detest these statistical comparison pieces that have ZERO mention of the obvious and most relevant causational reason for the disparity.
Interesting that Italian CEOs are the second highest though. I would never have guessed that. But yes, US companies are in general much bigger than the companies in other countries, so it would make sense that the guy at the top would make more in the US. Also the US has higher wealth disparity than most first world countries and this CEO study is just another indication of that.