Oh its almost as if the company line you are towing is dragging down your attempts at good sarcasm.
It's actually "toeing the line", not "towing the line". Possibly a reference to runners standing behind a starting line, or soldiers and naval crewmen having to stand at attention with their toes on the line. I know it's easy to imagine someone pulling a sled or something with a rope, implying working for, in this case, the company. But the actual meaning of "toeing the line" is to conform to set practices or standards. It still works in this case, in that Mr. Scouse is conforming to what the front office wants him to say about these stupid membership card things, but the saying has a slightly different meaning from what you may have intended.
- Etymology Man