Xequecal wrote:
Does the Canadian parliament work like the UK parliament where the minority party(ies) are all but powerless? In the UK the party leader can tell his party members how to vote on a topic, and refusing to do so is grounds for expulsion. Since parliament appoints the prime minister as well they can pretty much do anything they want.
Internal party politics are up to the party. If the party leader has enough support in his party, he can lay down the law and anyone who doesn't vote the way he wants, can be kicked out of the party. In very strong majorities with a popular party leader, yes, this usually means the opposition is almost irrelevant in parliament. (See Jean Chretien.) However, in reality, it rarely works this way.
Crack the whip too hard, and you'll have an internal party rebellion. The party leader is only as strong as his support within his party. Force your ministers to vote against their conscience, and you'll either alienate your voters, or be forced to act on your ultimatum. If one person votes against you and you kick them out of the party, they proceed to join an opposition party, and your government is weakened, and the MP you kicked out becomes a living martyr. Others in your party may side with him. The conservatives only have a 12 seat majority, which isn't enough to afford losing several seats.
Lastly, the official opposition party gets a hell of a lot of face time, getting to question your every move, debate every bill, and win over the hearts of the people in the process. Even with a majority government, you've only got about 4-5 years until you've gotta win again.