The relative impact of a CEO, whose job is to set strategic direction and direct human (tens of thousands of employees) and financial capital (billions of dollars) at scale, dwarfs that of any of its individual employees and the vast swath of them combined.
Most relevant to you, the majority of the benefit of this 7x increase in value in 7 years is actually accruing to the the shareholders, not the CEO. And guess who are the top shareholders of Aetna?
#1 Blackrock #2 Capital World Investors #3 Vanguard #4 T Rowe #5 State Street Source: https://whalewisdom.com/stock/aet
All of these above are money managers of "the people's" 401k's and retirements funds. So you can rest assured that the majority of the benefit is going to the people for whom Aetna owes its success.