Turnover is expensive and can destroy a business. The wage issue is simple, although apparently poorly understood: A job is worth exactly what someone is willing to fill it for. There are 2 schools of thought on the subject:
Pay as little as possible that ensures warm bodies, while also ensuring a high turnover.
Pay a good and increasing wage, after a probationary period to weed out the slackers.
As an example, our company, before we were bought out by a large public company (because we were doing so well), had an average of better than 20 years of service for the sales personnel, an average of 10 years for drivers and office personnel, but only a 5 year average for yard help (2 of 6 of the yard men being 20 year employees). That means, basically, we have 2 good yard help and 4 that are replaced regularly, and expensively.
The moral being, once you find someone worth a crap, pay them.