If the Members of Parliament (MPs) were paid to serve the government they would be bound to approve of all the actions taken by the executive branch of the government. This is not what is intended in a parliamentary democracy. Here the MPs are intended to be representatives of the people in the constituency from which they have won an election from. So, it naturally follows that the MPs are paid to serve the people by legislating laws in the parliament and by acting as a check to make sure that the decisions of the government reflects the will of the people.