Wages are not handed out based on your value. They are offered, based on what a company thinks you will settle for, and are negotiated, based on what you can convince the company you might be able to get from somewhere else.
Of course they are paid on "value." Have you ever had a job before? My career is in management and management consulting, I've hired, managed and fired my entire life and you are full of shit, you have no idea what you are talking about.

I know exactly what I'm talking about. You're just too much of a nitwit to understand. Jesus Hell, put down the crack pipe for a minute and stop flying off in a blind rage. Everything I have said is true. I draw it out to attention to highlight the fact that
the burden of improving workers wages must be upon the individual to assertively pursue the best wages they can possibly achieve, and that the view that employers will, or ought to, simply hand over the better wages is foolish and unproductive.
The point is for an individual to take responsibility for their own wages and to understand how and why the very best and most capable advocate in the world for an individual's improving wages is him/her self.
We pay to get the most value out of the job. You idiot leftists fundamentally don't understand business. Our priority is not lower cost, it's ... wait for it ... profit.
Profit = revenue - cost.

So let me get this straight....you pay for value, your priority is profit, profit is what's left after you subtract cost....yet lowering cost is not a priority?
Okay, now I know that you're full of shit. You haven't managed anything a day in your life. You just contradicted yourself! Minimizing costs is fundamentally an element of profit. If you can generate the same revenue with 10% less costs, then that creates more profit.
Duh!
"Value" is your contribution to profit.
This is ridiculously overly simplified, and if your career claims are true (as vague as they are) then you ought to already know that. At this point, I find it very difficult to believe your claims when you make such absurdly overly simplified statements like this.
First of all, an individual's "contribution" to profit is usually difficult to ascertain in the first place. What dollar figure can you put on a janitor's contribution to profit? That's next to impossible to actually assign a hard value to. Second, how can you identify the precise contribution to profit of an individual who does not yet work for you? You can't. At best, you can imagine a rough estimate of how well they will be able to do their job, based on their past experience and your personal interactions with them during the interviewing process.
But let's imagine for a moment that by some form of slut magic a precise figure
can be attached to my "contribution." Let's say that figure is determined to be $500,000 on the year. What is my "value"? According to you, my value is $500,000. Should that be my salary for the year?
Any employer who is going to do that is a damned fool and won't be in business very long. Anyone who really does have the (albeit vague) experience that you claim (and insinuate) you have would not be such a damned fool (unless you simply have the IQ of downs baby with brain damage). Even if I can accurately determine an individual's "contribution" to profit is $500,000 there's no way in hell I'm going to pay them that much money. Because if I do, there's no profit left in the first place! Except for them. But as an employer, I get nothing. What I'm going to pay that person is as little as I can get away with. Always. If I can get that $500,000 from a $30,000 a year employee, then that's what I'm going to pay. If the lowest I can get that $500,000 a year is $90,000, then that's what I'll have to pay. On the other hand, if I can get $600,000 a year for someone at $100,000, then I'll take option B.
We don't hire based only on cost, we hire to maximize profit.
And the Captain Obvious award of the day goes to Kaz!
I never said that hires are made based only on costs. Congratulations tearing down that straw man.
The negotiating room is based on the profit question. What should I pay to maximize profit? We pay more for employees who bring in revenue, we pay more for employees who will help us serve and keep our customers, we pay more for employees who reduce defects.
And? You just admitted that job offers include negotiating room. No employer is going to open the discussion by offering the maximum, unless they have a very good reason for believing that you aren't going to be accept for anything less. So thanks for conceding my point.
We don't underpay because that demotivates good employees.
That's not necessarily true. Some employers do under pay what their employees can easily get elsewhere. But typically it's because the employee's value has not be fairly assessed, or because the employee has settled for a long time at a lower rate while their experience and skill has increased over time, but the employee has not made any attempt to seek improved pay.
The leftist view that employees are socket wrenches and one is interchangeable with another and it doesn't matter what we pay so we simply turn the screws to make it as little as possible is just your Marxist mental masturbation with no connection to reality
blah, blah, blah, blah, blah, blah, blah, blah, blah, blah.
Stop inserting absurd tangents.
That you don't give a shit about your job or your employer, you do as little as possible and you have a bad attitude is why your value is low and why your pay is low
I do what? You're a damned fool. I'm damned good at my job. Which is exactly why I get paid well for it. It's why I am being paid 12% more than what the company originally offered me. It's the reason why I had several job offers at the time, and why the original offer I got from my current employer was the max of the range they originally anticipated for my position. According to you, that's impossible. The company had a range, anything above that range wouldn't maximize profit, so the counter I made should have been rejected. So why did they meet my requests? Because
they wanted the best, and they know that if you want the best you have to pay for the best. I convinced them that there was a good chance I could get the pay I was asking for somewhere else, so they expanded their pay range in order to secure me. So I got the best pay and the best position, they got the best candidate. The second company that was just an okay option got an okay candidate, the third company that wanted to hold fast and hoped to lowball me and work me to death all at the same time ended up with a lowball quality warm body.