One hurdle in removing staff is that many are based in Germany, where strict labour law makes it difficult and expensive to fire employees. Of the 9,000 job cuts announced in October 2015, 4,000 are in Germany.
In Germany, unlike Britain, for instance, labour representatives have an important say and appoint non-executive directors to Deutsche's supervisory board. They will argue for fewer cuts.
An additional downside to shrinking the workforce is that it could sap revenue. Regardless of this, however, the heavy fine demanded by the U.S. authorities could prompt Cryan to act.
Once Germany's only bank to go head-to-head with U.S. rivals on Wall Street, stricter regulation, rock-bottom borrowing costs and still heavy costs has squeezed Deutsche's profits.
Politicians in Germany, who are preparing for national elections in 2017, are watching developments nervously.
They are worried that the state could ultimately be called on to support the lender, widely disliked among ordinary Germans for its aggressive pursuit of success on Wall Street.
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