I'm not saying it is a bad idea, but CEOs face the same problem as politicians - while they are responsible for whatever happens (good and bad) they are not actually in control of very much.
A bad CEO can destroy a company in a few years. A good one can set up years of profits. But the "can" there does some heavy lifting - sometimes a CEO will walk in to a company and there just won't be any opportunities. Eg, you take over a restaurant chain then the COVID overreaction happens. Not much the CEO can do.
Long and short, I can see why a good CEO might go for guaranteed compensation rather than big payoffs for good results. They can't guarantee good results. Nobody can make that sort of promise.
A bad CEO can destroy a company in a few years. A good one can set up years of profits. But the "can" there does some heavy lifting - sometimes a CEO will walk in to a company and there just won't be any opportunities. Eg, you take over a restaurant chain then the COVID overreaction happens. Not much the CEO can do.
Long and short, I can see why a good CEO might go for guaranteed compensation rather than big payoffs for good results. They can't guarantee good results. Nobody can make that sort of promise.