“… The whole issue has actually laid bare just how MPs and ministers (paid for by taxpayers) are treated differently than other public sector workers (paid for by taxpayers) on drugs.
While civil servants are required to be vetted formally (especially those working with access to intelligence), MPs do not have to fill in any forms on drug use. If the spooks are unaware of any such conduct, they are powerless to advise a PM on the blackmail risk or otherwise of someone in line for promotion. …”
Source: The Waugh Zone (Huffington Post)