Hypothetically, a company could pay 100M in stock to the CEO, and then issue 100M in stock buybacks to the CEO. This is functionally equivalent to paying the CEO 100M, but it wouldn't count in your salary numbers. And notably, both of these, stock buybacks and CEO pay, dilute wallstreet in the same way. But neither benefits employees.
To use the JP morgan example, (and this is roughly equivalent for Google), the company could stop stock buybacks, and instead pay every employee an additional $150,000.
That results in the CEO and wall street getting less money, and employees getting more.
Walmart and Coke modulate the share price in other ways, so stock buybacks won't tell a particularly interesting story.
Thus CEO pay is absolutely the concern of workers, unions, and union supported politicians.
Yes, until the company offers a stock buyback (which these companies collectively spent more than 50 billion on in 2020)