This is one bizarrely made film and as such, this is really the only reason some may be tempted to see it.
The title in this case summarises the movie almost perfectly.
Set during the late 60's, early 70's it fictionally examines the supposed endemic police corruption of the time and the subsequent setting up of an Independent Commission Against Corruption (ICAC mirroring the film title) to address the issue.
Yes, it does resemble the same scenario, where Elliot Ness was given the task of setting up the "Untouchables" to battle organised crime and police corruption in Prohibition - era Chicago.
Unfortunately we don't get anywhere remotely near a Brian de Palma quality film with I Corrupt All Cops.
Made by Hong Kong well-known "B" feature director and sometime actor Wong Jin, this is a badly scripted, badly acted and totally unbalanced offering in terms of characterisations and narrative tone.
The first fully two - thirds of the film is simply gifted to a huge variety of villains (many of whom are cops) behaving badly. These villainous characters are invariably overplayed by the various actors, who include the director, to the point of parody and caricature. About the only thing we don't get is a moustached scoundrel tying some poor young virginal thing to a set of railway tracks. Weirdly, interspersed throughout the film, presumably to highlight their collective "breaking badness", we see many of these desperados not playing very nicely on a soccer field! There are no forces for good revealed and so the audience has to be content with the bad guys (and odd girl) beginning to fight among themselves.
Then without any real lead-in story we suddenly see an ICAC force being set up well into the second half of the film. Strangely Wong Jing decides to give the "good guys" barely any character development at all. Indeed the only way to really recognise a non-corrupt police officer, is by noting they are the characters in dark suits, who frequently say, "Yes sir!"
It would seem to this writer that the producers and Wong Jing really didn't take this film too seriously, so I'm not sure as to why a potential audience should. For a more sensibly balanced, dramatic and suspenseful Hong Kong look at police corruption, give me something like Infernal Affairs any day of the week.