You seem to argue that you think the pay in most businesses and sectors is unfairly distributed. That seems to be the crux of the argument. Am I wrong? I mean, it seems like you're saying, "the baggage handler is paid less than the pilot."
But, as you so poignantly pointed out, these jobs are not the same, and their importance is not the same. So paying someone based on the value of the work they bring in is fair. That's also reasonable.
However. The less important jobs at the air port DO outnumber the important jobs of pilots and air traffic controllers. Security, baggage carriers, janitors, collectively make up more than the aforementioned pilots and air traffic controllers. We're going somewhere with this, I hope, but it'll take a bit so stay put and try and bear with me, ok?
So then, when payday rolls around. When it's time to give each worker their fair share for their work:
Who is deciding who gets what? There's several options here, so lets go over each.
In option one, the workers do. Democratically voted. Great. The workers do own the means of production at the airport, right? So they all have a say. But, as I said, the low skill, low value jobs outnumber the pilots and air traffic controllers. So now, the janitors, baggage handlers, clerks and stewards all decide, by virtue of having the most of them, decide they get the most. Because they feel their job is worth more than what the others are willing to give them. Thus, the democratic majority in each respective area gets a bigger say in how they're each paid. The larger the respective job's base is, the more they're going to be paid. So. The air traffic controllers and pilots are far and away the smallest group. And thus, they will be paid the LEAST, because everyone else gets a bigger say in how much they're paid.
And then you have a total wage gap and the pilots and air traffic controllers will NOT work for the little they're getting.