Those who have not witnessed the making of a government have reason to be happier than those who have. It is a thoroughly unpleasant and discreditable business in which merit is disregarded, loyal service is without value, influence is the most important factor and geography and religion are important supplementary considerations.

The Borden Ministry was composed under standard conditions, and was not, therefore, nearly as able, honest, or as industrious an administrative aggregation as could have been had from the material available … There were some broken hearts – in one instance, literally. In others, philosophy came to the rescue, but the pills were large and the swallowing was bitter.

Paul Bilkey

Prime ministers can typically rely on ideological agreement and norms of loyalty to deliver them a modicum of party cohesion. Beyond that, they have at their disposal a variety of institutional tools with which to enforce discipline. The powers to invoke the confidence convention and to dissolve parliament are the most well known and powerful of these tools, but these heavy-handed measures are ill-suited for securing unity on an on-going basis. The prime minister's monopoly over the distribution of preferment is a far more reliable means of ensuring members' loyalty. The rules of the game are simple: if the member of parliament (MP) wishes to climb the parliamentary career ladder, he or she must toe the party line. The prime minister's power over MPs' parliamentary careers is not without limit, of course. Some MPs must be brought into cabinet because they are too powerful and dangerous to leave on the backbench where they can openly challenge the prime minister.