Negative effect of a failed CEO: $25M in severance pay [1]. Roughly 10-12 times the lifetime earnings of a college graduate [2]. When the cost of failure is to have enough income to live very comfortable for the rest of their lives, that is not a large cost.
Negative effect on employees: needing to find a new job, move to a new location, start a new social life, and that is all assuming that there is the recommended 3-6 month emergency fund. When 40% of US adults would be underwater from an unexpected $400 bill [3], this adds debt and uncertainty to be able to start up again.
[1] https://www.beckershospitalreview.com/compensation-issues/he...
[2] https://www.ssa.gov/policy/docs/research-summaries/education...
[3] https://www.fool.com/retirement/2018/05/23/guess-how-many-am...
Obama in 2009 was optically in conflict with bankers. Quoting things such as "I did not run for office to be helping out a bunch of fat cat bankers on Wall Street" [2]. 8 years later, he's getting paid $400k for 30 minute talks by them, repeatedly. For some reason banks and investors don't seem so anxious to turn Icelandic presidents into multimillionaires for a few hours of talking once they leave office.
[1] - https://www.independent.co.uk/news/world/europe/iceland-to-s...
[2] - https://www.reuters.com/article/us-financial-regulation-obam...
If I get fired, I panic as I blow through my savings and take whatever job I can get. I find that scenario to be a lot more of a risk.
An executive can, and should, arrange matters so that they come out ahead of the average worker even if they fail at their jobs. In that case, their risk is still lower than the average worker's.
Maybe they take some kind of big psychological risk? I doubt it. I'll bet that they are as rational about their jobs as we are about ours, and they see it as a pure transaction with no emotional attachments.
Or to put it another way, executive compensation must be order of magnitude comparable with potential personal gratification should the executive act in their own (and not the company's) best interests.
Paying an executive less than that is asking someone to make a suboptimal personal choice.
And while you may find people willing to do that (because ethics), you won't reliably always find good people who make that sacrifice.
In fact, every player who is involved with the company (workers, suppliers, shareholders, customers, etc.) is assumed to be acting out of self interest. What management does is to arrange matters so that self interest coincides with a unified interest that is the business entity.
> should they have almost complete financial and reputational immunity for their "bad" actions and decisions? (unlike regular staff)
Do they? Bad execs should be fired by the company's board. If the board is not doing a good job there, the business is bound to fail spectacularly. Also, execs at public companies tend to be public officers - their reputation is very much on public display. They are taking a big risk personally compared to a typical staff member. Maybe not so much financially - but they are employees, not founders.