Like MandatoryOvertime but unpaid.

Typically between 20 to 80 unpaid overtime hours per week.

As team members are so tired, they go to work to sleep with their eyes open (like fish seem to do) and therefore they make expensive mistakes that take a lot of time to correct.

This is a ViciousCircle. See HowToBreakViciousCircles.

This is part of MakeOthersLookIncompetent, and this also makes WorkersBecomeSick.

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Depending on the part of the world you live in, this may be illegal and grounds for a FrivolousLawsuit.
Cheers,--JasonNocks