The people make the job worthwhile
Consistency. And not using favoritism and nepotism. Stop waiting until an employee is ready to quit, to fix things.
They pay very low wages. For very high stress jobs. Tack on an attendance "bonus" then try to take it away or dock it, every chance they get.
Fire the CEO. Get one who cares about his employees. a very large percentage of these employees have to get on government assistance just to survive and feed their families.
Management, and pay. makes it hard to be motivated about a job that's terrible, when you're getting paid terribly, and required to work extra hours with lots of pressure to get sales