He wrote: "I am not sure what actually lies behind this endless series of questions and queries, but in fairness to all members it cannot go on.
"I have recommended to the chief executive that he instruct staff not to devote further time and resources on these recurring issues."
An RICS spokesperson confirmed that staff had been instructed to refer all comments from Hackett to the executive office.
Hackett has criticised the RICS for failing to address long-standing problems in the Brooke Review published this week.
Hackett, whose "Stop the Rot" campaign seeks to overturn the 32% increase in membership fees last year, said there had been "little discernible progress" in developing detailed proposals since Brooke's preliminary report in March.
The RICS governing council agreed to all 45 recommendations proposed by Brooke at its meeting on Monday, but Hackett said too little work has been done on detail. He singled out the proposal to cluster the 16 faculties under "Land", "Property" and "Built Environment" as too sketchy.
Hackett said that there had been no reduction in administration, no commitment to make minutes of meetings available in the RICS library and no acceptance that the Charter and bylaws of the organisation were out of date.
Hackett's latest campaign newsletter says: "The governing council has a heavy responsibility to not just comment/approve whatever is put before them but to ask the hard question: 'Does the Brooke Review go deep enough?'."
The RICS will be looking for temporary headquarters after it announced it was splitting its HQ in Great George Street, London. Part will be sold and part refurbished.
The organisation is also selling its premises in Cadogan Gate, London.
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