Earlier quoted context omitted.
Why is pure democracy a good thing in and of itself?
Because it's harder to corrupt a "pure" democracy. If you have a policy that is bad for the population at large, but good for your own interests, in a "pure" democracy then you will have to convince a majority of the voters to vote against their own interests.
You might want to understand the existing structure of government before you propose replacing it on a whim.
Here are some questions to get you started:
* Why is there a Constitution?
* Why are there 3 co-equal branches of government? What are they all there for?
* Why is there an electoral college?
* Why are Senators allocated by state while House members are allocated by population?
* Why do House members have 2 year terms and Senators have 6 year terms?
* Why do the courts exist?
* Why does the executive branch exist?