NSW Premier Mike Baird is promising to "streamline" oversight of the NSW Police including consideration of a UK-style Police Complaints Commission if re-elected in March, following public hearings into a long-running bugging scandal.

Mr Baird will make the announcement on Wednesday, as a parliamentary inquiry reports on its investigation into the scandal over Operation Mascot which targeted allegedly corrupt police and has rocked the most senior ranks of the NSW force.

NSW Premier Mike Baird said the current system for reviewing complaints against officers is complex and unsatisfactory. Credit:Christopher Pearce

Deputy commissioner Catherine Burn was team leader of Mascot, which bugged her fellow deputy commissioner Nick Kaldas more than a decade ago.

The inquiry has been examining why oversight agencies including the Police Integrity Commission and police internal affairs failed to resolve complaints about how Mascot was run, including why it targeted honest police and civilians.