I can answer that. They'd make the same amount, because they'd hire someone else.
Really? I thought you did the work of three people.
Your question was directed at Ray. While I'm sure he's an excellent truck driver, and it's certainly not a job that just anyone can do, there are still a lot of good/excellent truck drivers in the world, and people who could learn to be. So if he wasn't there to do his job, they'd hire someone else to do it.
I'm a fairly special case, because I'm an unusual person. So it would cost my company a lot more to replace me, since they'd likely have to hire more than one person to do it. That being said, I am still replaceable. My basic job skills as listed on my resume are far from uncommon.
If there wasn't anyone to do Ray's job the company would make no money. His job is more important to the financial health of the company than almost anyone else.
You say you are replaceable, but multiple people would have to do the job that you currently perform. So it stands to believe that you should be making as much as those multiple people.
Second half of your post:
You are correct that it would cost them more to replace me
at the level at which I perform than it would to keep me. And my employer is aware of it, which is why I get the perks of my position that I do. Doesn't mean I'm not technically replaceable; just that it would be a far less desirable outcome. The company's not going to stop existing and functioning if I die.
And unlike you, I am aware of the other considerations at hand that my employer has to consider. The first is that there are other employees in this company. I am the only person holding my particular job position in my department, but there are lots of others who do the same job for other departments. They get paid less than I do, because they have more people covering the responsibilities, and they accept that . . . to a certain point. If I start getting paid more than the managers do, my coworkers are not going to accept that, and neither would anyone they hired to replace them. And while we're on the subject, the
managers aren't going to accept that, either. My manager is pretty unique in that she could see that I was a rare and lucky break for the company and pushed for me to get paid beyond the going rate for my job, but there are limits. And if she were to leave, a replacement manager who wasn't here to see the difference between the job without me and the job with me wouldn't tolerate for a second having a subordinate who got paid more than she did.
There's also me to consider. If I start getting paid far outside of the going rate for my job description, I'm basically trapped at this company. No other company is ever going to pay me that outrageous amount of money, which means any sort of career change would require accepting a massive pay cut. And that's not even to mention the fact that even if I decided to accept that, no employer in the world would look at my past pay history and even consider hiring me, because they would assume that I would never be happy with so much less money, and would leave.
Now, you might say, "Well, if you were making that much money, you would never WANT to leave." To that I say, shit happens. I like my last job very much, but I was forced to leave because it required a ton of telephone work and I lost my hearing and could no longer do it. One or several of my coworkers could leave and be replaced by utterly intolerable people I can't stand to be around every day. The company could decide to relocate my office to another city, or even another country; after all, the owner of the company lives in Israel.
Bottom line is, I could probably demand more money if I really wanted to push it. But it would be shortsighted of me in the extreme, for a lot of reasons. And there's no way they're going to agree to pay me three times the basic going rate for my job title, and it's completely reasonable for them to take that position. After all, if they're going to have to pay for three salaries anyway, there's not much point in having ME around, is there? I kinda lose my special value to them at that point.