The Minority Leader in Parliament,
He said such a move will save the nation huge sums of money from the salaries and emoluments that will be paid to the Minsiters.
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Mr Iddrisu made the proposal Wednesday morning when he delivered a solidarity message at the launch of the national public sector reform strategy in Accra.
He said the ceiling must be done with support from across the political divide in a bi-partisan manner.
President Nana Akufo-Addo was subjected to a lot of criticism by Ghanaians and civil society groups for his appointment of a monumental 110 ministers last year.
Many argued that it will be a drain on the state coffers.