By your logic, "cost centres" (like IT, HR, and office management) within a business are bad because they don't bring in any revenue. Except of course in reality they are the same: they provide a service to the business that the business makes use of in providing goods and services to its customers.
I am being pedantic but for good reason: there is no a priori reason why your pay should go up just because your employer has become more profitable, except that it is in the interests of employers to make use of resources efficiently. If they are profitable then hiring more people so they can make more money is good. But it isn't a matter of "deserving" to be paid more or something. Pay isn't based on what you deserve for many reasons, including that you can't attribute the business's profits to its workers and ignore, for example, the investment in capital resources (including IP) required to enable the workers to work effectively. Mainly though because of supply and demand.
If an improvement in productivity makes you more efficient then there should be higher demand for you and you should be paid more. And indeed that is exactly what happens: people in industries that have productivity improvements are paid more afterwards than before.
Sure they do. Every employee contributes to the revenue a company brings in. If they don't, then they should be fired.
> Productivity growth literally is just wage growth, by definition.
Completely false. You accuse a commenter in a sibling thread of not having a good grasp of economics, but that feels like the pot calling the kettle black, here.