How Easyjet manages to be cheap

I recently had to get a flight with Easyjet.
All went well until me and the last 20 passengers were told we could not board. Questioning the laddie standing between us and the door, we discovered that a member of the crew had not arrived yet.
Health and safety rules etc demanded that there be certain proportion of staff to passengers so we could not get on the plane.
We waited and we waited for what seemed like a very long time until this elusive crew member arrived.
The poor lass had not overslept but had been mis-scheduled by Easyjet to return to work before she had had the statutory number of hours off between flights.
This is why the flights are cheap.
But that is why we choose them