Pm: authority and power within prime minister. However potential impediments to parliament such as a minority government therefore opposition party controls parliamentary committees. Another party might be dominating the senate, despite a majority govt. The courts: if laws/ regulations violate charter of rights and freedoms/ constitution. Pm powers undermine legislative branch and individual mp"s. Although we have principle of responsible legislature this is subverted by the presence of strong party systems. Immense concentration of power in the hands of 1 power. Outcome of parliamentary debates are predetermined. Cabinet solidarity: government can only have one position. The advantages to this system is that the government is a strong centralized system. Members of cabinet selected by prime minister. Members are collectively and individually responsible for parliament. Can appoint whoever he wants but there are conventions that influence these appointments. Size for cabinets?--> up to pm no particular size.