With Central Bank Governor Valiollah Seif sacked, Iran’s economic crisis has claimed its most senior victim to date. More economic reshuffling is likely, but Iran needs more than cosmetic changes.

President Hassan Rohani on 25 July appointed Abdelnaser Hemmati as CBI governor to replace Mr Seif, as the country faces a renewal of US sanctions after Washington withdrew in May from the 2015 nuclear deal.

The dismissal of Mr Seif follows recent speculation that the country’s top...