A concrete example is the recruitment of new staff. Core values are often used by an organization in their recruitment campaign as a way of attracting the right talent. The core values on paper are used for this, creating an expectation that this will be in line with the real behavior in the organization.
If behavior within the organization is not in line with its core values, the result is a mismatch, with all its unpleasant consequences. A strong corporate culture where core values are lived leads to a more effective recruitment process.