He told BBC Radio 4's Today programme that the current policy on accepting staff was "too permissive" and left "too much ground for interpretation".
He added that "byzantine and complex" police regulations mean that some officers under investigation have already been sacked by the Met, but were then reinstated by an independent lawyer.
"Listeners will be surprised to know that the commissioner doesn't have a final say who is in his or her organisation," he told the programme. สมัครบาคาร่า