I think not necessarily. It also means freedom and power.

The flip-side is: you need the money more than your employer needs you. Which puts you in a bad position to negotiate salary, makes it hard to stand-up against bad decisions, etc.

I think that it can (not sure if the author meant this) also mean that you have a buffer and are OK with switching jobs, but are also in a position where your employer wants you (because of something you can do). This puts you in a GREAT negotiation position.