When dealing with people you want to trust, "honesty is the best policy".
If someone you know is hiding things from you, being evasive, telling you don't "need to know", then that trust is broken.
When these people you want to trust are your leaders, and several issues have come up in a row, and they still continue to maintain their secrecy as if above the law or moral scrutiny...THEN all hope is lost.
In a personal relationship, you'd walk away unless it was a life threatening situation.
In a professional relationship, the lack of trust would erode any hope of a partnership.

What about the future of our government?
Americans won't stand for the continued brush-off, they will demand answers.
And unless they are forthcoming, the current administration will dig it's own grave.