The financial arrangements might be something that should be looked into. That sort of thing engenders suspicion.
For the juicy entanglement, trying to write it up somewhat:
During 2019 a parliamentary investigations committee explored in particular entanglements between external consulting companies (McKinsey and Accenture), an apparent preference for particular consultants in the MoD and several government-owned companies (controlled by the MoD).
During the investigation other problematic behavior was uncovered - it was e.g. alleged that BWI was using some internal fonds to "store" profits that the government-owned company legally isn't allowed to have, and that that "black fonds" served to pay for external consulting circumventing tender requirements. Similar practices were alleged - by Bundeswehr personnel - to exist in multiple cases in connection with the above consulting companies.
The main object of interest within the MoD was the State Secretary at the MoD Katrin Suder, i.e. formally the deputy MoD picked by then-MoD Ursula von der Leyen; also of interest was General Erhard Bühler, the head of the planning department at the MoD. Both were personal friends of Accenture CEO Timo Nötzel - Suder worked together with him at McKinsey previously, Bühler was the godfather of Nötzel's five kids.
We're not talking small numbers either btw - in total Accenture during the tenure of CEO Timo Nötzel with his personal relationship with Katrin Suder increased their Bundeswehr contracts from 459,000 Euro in 2014 to 20 million Euro by 2018. In 2014 both Nötzel and Suder had left McKinsey and got their new jobs at the MoD and Accenture respectively.
Suder's defense was that "she wasn't actively involved in procurement decisions" (her job's portfolio included having the planning department with General Bühler directly under her...) and therefore had nothing to do with such contracts going to former and current friends of hers. The committee concluded in that case that the primary culprit was General Bühler but that Suder was "involved" in getting access to the MoD contract for Accenture.
Accenture getting the contract in this company was hidden behind a strawman company that signed the contract and subcontracted it to Accenture.
The overall investigation was actively hampered by the MoD (U. von der Leyen) to the point where evidence - chat protocols of her cell phone - was destroyed after the investigation committee had filed for its release. This was only admitted in closed sessions under confidentiality rules, but leaked to the press by opposition representatives in the committee.
The investigation concluded without any repercussions for people involved based on the government party representatives within the committee saying so and a lack of evidence proving otherwise. Opposition party representatives published a "divergent opinion" in which they alleged the 720-page report glossed over certain parts and was covering in particular for von der Leyen.
Suder left the MoD in April 2018 and received the Honor Cross of the Bundeswehr Medal in Gold from von der Leyen upon leaving. Bühler, due to the investigation, had his promotion to four-star general and posting to become Commander JFC Brunssum (NATO) delayed by four months. He retired about four weeks ago.
With two of said opposition parties now in power the new government end of last year
(i.e. within three weeks of their takeover, and just before the case may have hit its statue of limitations) formally filed a civil legal case for damages amounting to about 631,000 Euro in that particular case against the intermediate contractor for 2,654 work hours subcontractor Accenture did not deliver at the time.
