Comment by SunshineTheCat

This just comes across as extraordinarily whiny.

The core of what the author is saying is true, I've experienced it myself (not a promotion, but a raise).

Taking on more than your responsibility is one way to do it, another (with some overlap) is to become indispensable.

In some cases, this means doing more work than your job entails, but not always. It can be something as simple as automating a task that someone else was doing by hand.

When you start stacking up little things that make you more valuable to the company, it's in its own best interest to find ways to keep you (via promotions, raises, benefits, etc).

There isn't a guarantee of anything here, but it definitely sets you up for success.

A thousand times more than sitting around whining that something isn't your job or that the company is being mean.