there were no checks in place at the time to prevent the SIS acting unlawfully, and nothing's been done since to stop it happening again
Hell, why can't I simply apologise for speeding and be let off any consequences?
Is it because I am not an agency of the government?
Two sets of rules YET AGAIN!
When the state is not held to the same (or higher) levels of accountability as regular citizens then there is nothing to prevent abuse of power and corruption.
That's where we're at folks.