He did not 'scruple to lie' about it. [=he was willing to lie about it; lying about it did not bother him]
They seem to have no 'scruples' [='qualms'] about distorting the truth.
She acted without 'scruple'.
(..) They taught me that each man has a role to play. The same is true at court. I am the master of whisperers. My role is to be sly, obsequious and without scruples. I'm a good actor, my lord. Huh. Can you free me from this pit? I could. But will I? - No. (..)2011 TvShow: Game of Thrones Title: Baelor Season: 1 Episode 9