Give an example of even one time Murkowski's vote stopped a Republican bill from passing.

You won't find a single time that's happened.

The only time she votes against the party line is when they have the votes for passage without her.

The Party gives Collins and Murkowski their masquerade only when passage is otherwise secure.

Why would you want her out of office when she is so successful at fooling 'moderate' voters into supporting her?

The Party rewards her for her loyal service, you might not get a real warm welcome back at the clubhouse if you screw up their theater.