I've been a founder and an early employee as well. As a founder, you sign on for the bad times. As an early employee, I always got duped.
As an early employee, I've had to go without a paycheck on multiple occasions. I had to go without healthcare for several months even though I was told the company already had it in place.
Sure, I could leave anytime I wanted. But I would forfeit all my stock if I left. Even if I left because they stopped paying their engineers. Besides, the money was coming. Why leave now? They promise they will make it up.
I've been told that everyone in the company had to take a 20% salary reduction to keep things alive. I could have left then too. Again, forfeiting my shares. But again, I bore the downside of the business without anywhere near the potential upside.
The important part is that none of this was malicious. The founder just had no idea what he was doing, and thought they had to lie for the good of the company.
As an early employee, I hired people into both the companies I'm speaking about. I'll never do that again. I haven't ever done that again. I urge everyone to not be the first engineer.