The Senate and Parliament both have such powers . . . the issue here is the specific that its act is declared to do.
As an example, the Senate could move to itself conduct an inquiry for the purpose of gathering the facts needed to propose and pass new legislation.
On the other hand, it can move to call for a Royal Commission (and that is then answered by a Writ from the Governor General as Representative of the Queen as Head of State) with extraordinary powers (as defined by the Writ) which can include powers to conduct a criminal investigation and recommend or even prosecute charges . . . and this little baby is conducted in just the same manner as a court hearing.
A seasoned Law Court Judge presides, and is assisted by Barristers and law clerks etc., and witnesses are allowed Barristers (attorneys) to represent and advise them . . . but examination during the commission is conducted under Rules of Evidence cross examination . . . just like in any criminal case.
The Melbourne Inquiry of '64-'65 ostensibly was this . . . though a smaller State Parliament affair (limited in scope and power to the State of Victoria).
I was subpoenaed to appear in that little side-show . . . which, by the way was a true sham and perversion of due process and justice.
But times are different. So are the issues, the crimes and and the people involved.
This affair will be the Event of the Ages!
This is National, not a rinky-dink state side show. This one is based on real need following exposure of a consistent pattern of crimes and perversion of justice. The 1964-5 Victorian State side show was the result of political expediency following pushes by vested interests.
This one has the public interest and a demand for something to be done!
BIG difference. In 1964 it was a case of: who the F*** are these Scientologists, and who cares? Now it is a case of : Oh, Shit! This shit has to be stopped; these bastards are warped, evil, and way bent out of shape!
This time, I see justice actually being done
RogerB