If people were just paid the true value of their work we would have a much smaller problem.
But most people don't get paid in any relation to their work. They get paid a market wage. Which is just another way of saying lowest possible wage.
So most are paid the lowest possible wage. That is the worst way to create a vibrant economy. The way you create the most vibrant economy is to pay workers as much as possible.
But who really gives a shit about the economy. Things are working out so well for those at the top even without much of one.
It's impossible to measure the true value of work because there's no way to resolve what share goes to each input when you are dealing with a synergy situation (and you almost always are.)
Your notion that the worker gets 100% is obviously flawed--it doesn't pay for the equipment, thus there will be no new equipment.
The idea that there is some "True Value" of anything, a product, a service, labor or of capital investment, that they have a value independent of their market value in money is pretty much a product of Austrian/Libertarian/extreme free market economics. They usually explain it as the barter value of whatever they are talking about. The value that the factor would have in a pure barter exchange, one good for another without the use of money.
But this idea is derived from and is almost wholly dependent on their obsessive dedication to the gold standard as the pure form of money. They don't accept our current money, which they incorrectly identify as fiat money, as an acceptable or an even better form of money than their beloved gold standard. They only accept that modern, bank credit money is a medium of exchange. They reject the idea that money is a storage of value and that it is a measure of value. This means that they have to have another measure of value, therefore the formulation of the idea of true value or the barter value of an economic factor.
On the other side of the coin we the classical economics idea of the intrinsic, objective value. This is the use value of the factor, the value that it has when used by the buyer. This is closely tied to the labor theory of value of the classical economists like Adam Smith, David Ricardo and Karl Marx. Obviously, factors can be put to different uses by different buyers so that the value of a factor is different for different buyers.
To all of this we add the modern neoclassical idea of utility. This is a subjective form of value, the idea that the value of something is related to the satisfaction that a buyer gets from consuming it. Once again, the utility of something can vary from individual to individual.
But when modern economists talk about value they are usually talking about the economic or exchange value of something. This is the value in monetary units, dollars for example, in short the price of the factor. It is the value of something when it is exchanged for money in the market. It is affected by both its objective and subjective value to the users, the demand for it, as well as its relative abundance or scarcity, its supply relative to the demand. All tempered by the availability of suitable substitutes for the factor, automation for labor, natural gas for coal, etc.
And while there is an objective component to the economic value it is largely the subjective utility of factors that determines its value to the users and its price. And this value exists in the heads of human beings, even those values that are considered objective or intrinsic.
Therefore modern economists say that we have a utility theory of value. A subjective value.
We have a purely monetary economy now. There isn't any value beyond the prices of factors. There is no "True Value" or labor value that is independent of the price that is paid for it. The value of something is its price.
(Even this idea runs into trouble when neoclassical economists try to prove that capital investment is not just a component cost of production but is something like a loan that can never be paid off, that it is a value to production like no other that deserves a perpetual income in the form of profits. Unless of course, the enterprise is computing their taxes, then capital investment is a pure expense to be written off against their tax bill. But this is an explanation for a different time. )