Political parties are not companies though. The workers in your example will eventually be held responsible if their preferred solution fails even though they might not get the credit if it succeeds. In Corbyn’s case, as the Labour leader, he has to stand behind the messages disseminated under his leadership with his name. Any positive impact on votes by the wider campaign will likely result in voter deception, since Corbyn will believe his message is what worked.

The most worrisome issue here is that Corbyn’s goals don’t align with his subordinates, yes, but deceiving a political leader isn’t just about that leader but the voters as well.