CEO's are just sharing in the profits
The real reason is that the management sets everyone's compensation including their own. So, the Board votes the CEO and themselves a generous compensation package, and the staff get peanuts in comparison.
Since the CEO appoints the Board and the Board appoints the CEO, it is clear that they both deserve a huge payback. A man of words and not of deeds is like a garden full of weeds; a man of deeds and not of words is like a garden full of turds — Anonymous
One Director I knew blew £100M on an IT project to "e-transform" the business with virtually no positive benefits for the business other than the "learnings" gained. I am not aware of it having adversely effected his career although he has recently left the business - c. 7 years later- which is several lifetimes in terms of the corporate career culture nowadays. So no-one would have remembered his earlier project in any case.. notes from no w here
Properly, CEO compensation is still a "remuneration cost"
Salary (a "remuneration cost") is a component of Operating Expenses. Salary is however only a portion of total compensation afforded employees. Stock options, for example, are not an operating expense. Allocation of certificates held or withheld from future issues is a Balance Sheet (credit event) description of total assets.
Deferred cash compensation and schedule distribution typically are not represented in any one consolidated financial statement, as corporate officers routinely reserve disclosure of profit (loss) attributable to the activities of special purpose entities (SPEs) such as bonus pools and subsidiary trust funds in which "c-level" (recall Hank Greenberg, AIG) hold ownership interests. Diversity is the key to economic and political evolution.