Well, according to [0], Aetna's revenue in Q3 2018 was $15.5 billion - so, extrapolating, their yearly revenue was something on the order of 60 billion dollars, of which that 500 million you mention is just 0.8%. Also, some of that $500M is in stock, not cash.
It's not about what percentage of their revenue it is, it's about how that money that should go to adding customer value, not making exceedingly rich people richer.
500 million dollars could change the lives of tens of thousands of people that Aetna calls customers... but instead it goes to ONE person.
It also says that the net income is 1 billion though, and 500 million is half of that. High revenue doesn't always mean that the company is generating that much value. Just look at Uber.
It's not about what percentage of their revenue it is, it's about how that money that should go to adding customer value, not making exceedingly rich people richer.
500 million dollars could change the lives of tens of thousands of people that Aetna calls customers... but instead it goes to ONE person.
It doesn't have to be that way.