Do you understand the role of the whip's office and what they do? That's not just in Parliament but in Congress as well. While Francis Urquhart or Frank Underwood are extreme examples, neither are too far off the truth. They exist to fight in the mud and drag as many MPs into it as possible so they can ensure absolute discipline and loyalty.
I don't even know how to reply to this.
You know your examples are fictional?
Guess we're okay with blackmailing now and using sexual harassment as leverage (instead of reporting it) because a fictional character got away with it in season two of House of Cards?