In Westminsterian governments (Australia, UK, Canada) whilst political bodies (the parliament, senate or House of Commons) can order investigations they do not conduct them, the investigation is handed over to actual investigators like judges, lawyers and
police (oh crap, these are government
employee's
too, thankfully I'm not a paranoid nutbag).
It's
too easy not to; terminating a mass group of
employees because they can't self -
police their own behavior isn't an option.