"The average man won't do a hard day's work if he can get out of it." -- Secretary Mellon
I love that one! Hear it all the time. Used to ignore it when I was in business, and focused instead on successfully increasing my employee's productivity. Theory is one thing, practice is another. If your employees are lazy, try reflecting on the well know rule of thumb: "Eighty percent of all workforce related problems can be attributed to poor management." It was one of the 'Big 8' accounting firms that came up with that.
There are tons of people in management -- mostly concentrated at the lower levels -- whose understanding of people is all but remedial. That is, they do NOT have a firm and accurate grasp on how people will respond to being treated in a given way.
Specifically, they cannot consistently predict that if they treat their employees in X manner, their employees will be likely to respond by becoming demoralized and demotivated, thus giving not-so-astute observers the impression of genuine laziness. These incompetent managers naturally and understandably seek first and foremost to blame anyone but themselves for their 'lazy' workers. Hence, I think, a source of the saying, "The average man won't work hard..."
People can say whatever they will about it, but a competent manager can get his or her team to move mountains.