I did not say that salary = work. However, given your salary, increasing your effort increases your reward. A lazy banker earns more than a productive grocery

I did not say that salary = work. However, given your salary, increasing your effort increases your reward. A lazy banker earns more than a productive grocery store employee, but a grocery store employee taking twice as many shifts earns twice as much money as the regular grocery store employee. And they should not be punished for doing so. To roughly quantify a salary, it would be something like salary = base salary of trade x negotiation factor x hard work factor. Hard work should not be punished. If you want to equal out various types of work, you could say "based on average income for your position", rather than your income, but then other problems appear.