People complain all the time about not being compensated relative to their value to the company, but when people are compensated relative to their value, people still complain. There's no win.
The main limit to executive entry is having access to an executive vacancy. The short version is that if you are an honest hard working employee that access will never be available to you.
You're acting like running a large business isn't a skilled position. It very much is.
A janitor at a hospital cannot become head surgeon by continuing to work as a janitor, and while a janitor is critically important to the hospital, the supply of janitors is such that the pay will never compare to that of the head of the surgical staff.
The typical path to surgeon might look something like this:
High school -> Pre-med -> Med school -> etc. -> surgeon
The path from janitor to surgeon might look like this:
High school -> Married -> Janitor -> Family -> Quit job to go back to school -> bankruptcy, divorce -> janitor
To return to the topic at hand, it's entirely fair for top executives (or surgeons, etc.) to be paid their value, but only if it's also possible for others to try to achieve the same value. Path dependence breaks fairness.
Those two things are completely unrelated.
And why the fixation on janitors? I never said janitors should be paid like executives, only that the paths to higher paying positions need to be more widely available.
Everyone is entitled to some things, but no one is entitled to everything.