There's only so much money to go around. If a CEO / upper management take more money, then that is less money available for wages for those lower down the chain so to speak or more money taken from customers.
Sports teams are a great example of the lopsided way things are setup. Billionaires make most athletes millionaires. But yet the wealthy people can't pay for their stadium to actually fund this endeavor. Nope, that is for the less wealthy (taxpayers) to pay for that. And then fans pay the salaries via increased cost of tickets/merchandise that have to be raised.
TV stations payout millions to get content (always increasing) and then charge ever increasing amounts to service providers who then charge every increasing amounts to their subscribers flowing money generally from the have nots to the haves in every increasing amounts. The money schools are swimming in that comes from the BTN which in turn comes from all of us peons who are paying more for our tv subscriptions. Money flowing generally from the have nots to the haves.
Papa John's complaint a while ago also illustrates the issue. He said if minimum wage was increased, then he would have to raise prices that were charged to consumers. Of course, lowering his salary or that of upper management wasn't on the table. As always, It would be a choice between taking from the haves or the have nots and the haves usually get to decide who gets to take the cuts.
Then we have the tipping phenomenon that exists to a larger extent in America than anywhere else in the world. Management wants to get around minimum wage by having customers pay tips to subsidize employee wages. They get the benefit of lowering salaries for the bottom dwellers by making them dependent on the generosity of consumers. It also adds the benefit of making your prices look lower because most customers likely don't do the math in their head. Sorta like hidden fees that hotels, airlines and ticketmaster try/succeed to get away with. Make stuff look cheaper than it is.
On a final note, often time people's raises are based on percentages and not flat amounts. The claim is everyone is getting a 3% raise or whatever so it is fair. However, 3% for someone at $30k is a lot less than 3% for someone at $200k. It does nothing but increase the gap and I'm betting those who want to go with percentage are fully aware of that fact and unfortunately they are the decision makers.
Person A = Upper management (aka Decision Makers)
Person B = Workers
Person C = Customers
For Person A to make more, either person B has to make less or person C has to pay more. Given person A makes decisions, they tend to make more and more at the expense of B and C. If capitalism fails, it would be due to greed.