Some places can thrive with lots of overtime -- if they can attract the right kind of people, like Space X can. Other places can do great if their employees

Some places can thrive with lots of overtime -- if they can attract the right kind of people, like Space X can. Other places can do great if their employees have no alternatives -- like Amazon. Some can do extremely well if they use slave labor, like ancient Rome or USA. But in the vast majority of cases a lot of hours worked cannot be sustainable or beneficial to the employee.