If it turns out that the allegations in the leaked report are true, do you think such a small group of staffers could have had much impact on such a complex network of semi-independent systems as a national party election campaign?
(I thought by the way the staffers in question had mostly departed, by the time of the 2019 campaign.)
The employees and line managers working within the Labour Party Central Office have access to all information and communication going to and from the leader's office and party in general. They also are charged with the distribution of affiliation and general funding into and out of the Labour Party centrally and affiliation funding from trade union branches etc made towards specific chosen constituency and district parties that those branches have taken out extra affiliation to.
Therefore many of those in central office are, and were in at the time of Corbyn's leadership, in the perfect position to divert funding and misuse communication and information to or for purposes that had not been authorised by any in authority within any of the above bodies.
Therefore the allegations of undermining of the type laid out above at Central office were being investigated by Jenny Formby in her role as General secretary prior to her being brought down by serious illness. The partly concluded report was leaked to the press following Corbyn standing down as Labour leader and an independent investigation into the leaking and allegations was set up and its findings long concluded.
That report has been with Starmer for nearly six months now but he refuses to release it to the Labour party, broader movement or the media which huge sections in the affiliated membership feel speaks volumes in itself.
Many of the staff remained at Central Office until Starmer gave them compensation for stress and damage to their reputations for the allegations contained in the leaked report despite being informed by the Labour Party legal department that the party held a very good defensive case in the matter.
That caused Len McCluskey to state the now famous words regarding Labours administration quagmire and nightmare, "put your claim in over there and collect your compensation over here......no questions will be asked.