Even on an absolutely selfish level: because someone who had a good night's sleep is a lot less likely to crash the bus into a wall. Experimenting with pushing

Even on an absolutely selfish level: because someone who had a good night's sleep is a lot less likely to crash the bus into a wall. Experimenting with pushing a human being to their very limits just because you can tends to have blowback, eventually. If I found out my company shuttle underpaid its drivers like this I'd be disgusted, but I'd also be worried for my own safety.