Changing the direction of a company and guiding it through a Lean Transformation process is always contingent upon gaining the support of the people that work there. Telling them the truth, giving them the tools they need to succeed, treating them with respect as adults and holding them accountable are core leadership responsibilities to achieve this.
I was once hired to be the President/COO of a Major U.S. Automotive Class A Metal Stamping Die Manufacturing Company. The company had not been making money for several years and its parent company (and their new owners) wanted it fixed or closed.