Yes, we have a representative democracy. Our elected officials are supposed to represent our best interests. Their actions were to be restrained by the other two branches of government. When established, much of this nation was illiterate and ignorant about the issues, especially at the federal level. (Some days I wonder if much has changed🙁)  Most elected officials weren't worried about a career in politics; the model was that they served their country, then returned home to their day jobs. But those were simpler times. 
Consider the length of our Constitution, our primary governing document. Even with amendments it is dwarfed by most legislation. The ACA, which covers a mere 1/6th of our economy, is over 2,000 pages long! Who has time to read & analyze the issues it presents. No wonder it's such a mess. 

So I'll continue to vote for candidates who seem to represent my best interests. I'm not interested in the tyranny of a democratic majority, with lock step representatives.