> The nurses may be working 12 hour shifts, but they’re unlikely to work more than 4 in a week. Overtime is expensive for employers, so they prefer to hire more

> The nurses may be working 12 hour shifts, but they’re unlikely to work more than 4 in a week. Overtime is expensive for employers, so they prefer to hire more or hire contract nurses where necessary. Or they're picking up more hours at a different hospital, so there's no overtime but they still make more.