I would also imagine that on several worlds, the idea of the Arbites arriving to investigate a title shortfall and discovering a planet in a labor revot would have bad consequences for the entirety of the planet. While this might be used as an argument to keep the workers in line, it's also a motivation for the businesses to maintain a mandatory level of morale somewhere above, "We've got nothing to lose".
First rule of human resources - Always make sure your workforce has something to lose.
