Humility is important for managers - no one is that smart. The company may find its employees going in one direction while its customers are moving in another. Quality is a Management Problem Employees can be viewed as craftsman. They want to be proud of the work they do. Bonuses, pay for performance etc.
Quality is a management problem.
You produce quality by addressing the production process, not by motivating employees. If the raw materials you are buying are not consistent in quality, no bonus, no wall chart, no MBO discussion will turn that raw material into a quality product. This takes a manager talking to a supplier. This is so fundamental to the Quality Effort. Managers are responsible for quality, not employees.