In a democracy, the government gets its powers from the people. In a representative democracy, the people have representatives that develop the plan of government. The people decide what kind of government will exist and what powers the government will have.
In a democracy, or more specifically in a democratic republic, the people elect leaders who make decisions for them. The representatives listen to the concerns and beliefs of the people they represent, and then do what the majority of the people want them to do.
Our constitution begins with the words “We The People” to indicate that the government gets its powers from the people. The government is there to fulfill the wishes of the people and not the other way around. We believe the government exists to serve the people who created it.