>It wouldn't be impossible to quantify it for all but edge cases.

It would be impossible to quantify it because there's no objective measure of value. The current system allows value to be quantified by people's revealed preferences: the jobs people are willing to pay more for get paid higher. If there's no market for labor then there's no revealed preferences and it's impossible to know which jobs are creating more value for people (only what jobs are creating more value by some bureaucrats personal subjective measure of value).

Except those edge cases would likely destroy the whole system. The value of an hour of labor isn’t based on the time it took to acquire the skill, it’s based on the value of the good or service produced to society. Whether it takes a normal person 4 years to acquire that skill, or a genius 4 days, the value is what it’s worth to other people.

That value not only has a very wide range, but also it’s constantly fluctuating. If you try to centrally dictate it, you’ll be constantly getting it wrong, distorting the labor market just as badly as artificially low interest rates distort other aspects of the economy.