America has been historically greatly admired for a number of reasons, the Goodwill you have developed over more than a century has been invaluable. Literally invaluable.
Transparency/accountable government is certainly a vital contributing aspect of this respect garnered around the globe. Whether good or bad, be honest with citizens and hold accountable anyone who violated past policies, adjust future policies accordingly. Truth is the disinfectant that maintains said reputation.
Chuchill once famously stated, "In wartime, truth is so precious that she should always be attended by a bodyguard of lies." The key to his statement is the differentiating distinction he applies: "wartime".
In war, as with spycraft, this concept is true for free nations. In times of peace however, only honesty with oneself can future decisions be best meted.