One of the key roles of a manager is to control the work that their staff perform. In a great number of organisations, this leads to a tendency to create a policy, process or procedure for everything. Good intentions, but an absolutely horrible way to control anything. As the title of this article says, corporate culture trumps policy, every time.
It doesn’t matter how many policies you have, or how well their written. In the end, an organisation consists of people, and those people determine how work is done. If the corporate culture encourages greed, laziness and underhandedness, your policies won’t be adhered to. Even in organisations with relatively good cultures, there will still be a degree of interpretation of any policies, and staff will still adhere as they determine appropriate.
While policies have their place, what really drives your ability to control the work your employees do is paying less attention to the small details with policies and processes. Instead, focus on the general culture within your organisation. If the culture is one of fairness, where staff work together collaboratively to reach organisational goals, controlling work output takes care of itself.

completely agree– never understimate the power of the culture in a workplace– particularly one that has been around for a while!