What is the underlying reason for SEBI's permission to allow stock brokers and clearing members to park client funds in mutual fund overnight schemes?

Capital market regulator SEBI has allowed stock brokers and clearing members to park client funds in mutual fund overnight schemes as they invest only in risk-free government securities Brokers and clearing members should ensure that the overnight schemes invest only in government bond, overnight repo markets and overnight Tri-party Repo Dealing and Settlement (TREPS). Such Mutual Fund Overnight Schemes (MFOS) units should be in dematerialised (demat) form and must necessarily be pledged with a clearing corporation at all times.