Ibrahim feared harsh penalties would spark officer defection and mutiny. [causal]
Ibrahim responded by saying that, in effect, he could not be more strict for he was faced with the possibility of officers defecting and with the likelihood of a massive mutiny by the soldiers. The matter, it seemed, concerned harsh penalties that were needed to maintain discipline and his belief that they might be counter-productive.
Khaled Fahmy, All the Pasha_s Men_ Mehmed…, loc. 1331