What is the difference between value and leverage on a microeconomic level? Despite the common notion to "provide more value" to a business if you want a raise

What is the difference between value and leverage on a microeconomic level? Despite the common notion to "provide more value" to a business if you want a raise, it seems most business people, and thus those responsible for employee raises, conflate value with leverage. Someone can double their output and easily be denied a raise because they have no leverage. However, if you have leverage but do not increase your output, you can likely get a raise. So maybe we should nix the old advice about "creating more value" as it's a very confusing and an unclear metric. If businesses see value as leverage, employees should do the same as that's the only way they'll get what they want. I hope this makes sense, I've been trying to figure out the relationship between value and leverage (at s microeconomic level) and they seem to be almost, if not completely, identical. Thoughts?