I don't think that holds weight. The federal government employs nearly 3 million people, and of course some of them will lie to better serve their interests. You'd reasonably expect this. You see racists making similar arguments about random minorities - a few isolated cases expanded into a gross stereotype.

To blanket dismiss any statement as untrustworthy is unwise and misguided.

The problem with liars isn't that they lie, it's that sometimes they tell the truth.