First past the post creates the two party system. The multi party parliamentary systems give far more power to the party leader to the extent that all tweets by

First past the post creates the two party system. The multi party parliamentary systems give far more power to the party leader to the extent that all tweets by liberal party members in Canada have to be approved by the leaders office. So instead of a MP that represents a constituency it ends up with only ~5 leaders that are allowed independent opinions.