You actually kind of don't want to be the face since having a 'face' means that they're not letting their imagination run wild and freaking themselves out. Just stir up some gossip among the bottom teir nobodys, etc.

If you convince them that management is considering leaving, then they may try incentivizing just the management positions. You more or less want something widespread so that they're panicking and trying to put fires out.

Instead of making yourself the source of the gossip though, frame some unnamed individual; ask someone higher up that you're friendly with "Is it true that Mr. X found a job somewhere else?"

That all said, the biggest raises I've gotten (apart from just getting a new job) have been because the company can't hire new people and keep them for more than a week, so you can just make everyone miserable to make the place look terrible and scare off the new hires. Then when they bump the new-hire pay by $3, you just demand the same raise for everyone working there.