Passage: As in some other parliamentary systems of government (especially those based upon the Westminster System), the executive (called "the government") is drawn from and is answerable to Parliament - a successful vote of no confidence will force the government either to resign or to seek a parliamentary dissolution and a general election. In practice, members of parliament of all major parties are strictly controlled by whips who try to ensure they vote according to party policy. If the government has a large majority, then they are very unlikely to lose enough votes to be unable to pass legislation.

Question: What are the parliament members controlled by?
whips