http://news.ycombinator.com/item?id=2936365
The reason we have representative democracy is not because of scaling factors.
It's because direct, voluntary democracy usually leads to utter failure. Our ancestors, who studied a tedious problem-domain subject called "History", could examine the case studies and draw this conclusion with some confidence.
There are better places to direct your attention if you don't like the outcome of the current system.
For example, should the power to create the laws and the power to appropriate funds be vested in the same body? Hayek wrote an interesting hypothetical Constitution based on this simple question.
My pet peeves are all around voting systems. For instance, voting in most countries is voluntary. That has well-understood failure modes.
And the UK and the USA have first-past-the-post voting. Which is ... just dreadful, actually. Arrow's Theorem shows that there is no "perfect" voting system possible, but some are definitely better than others. FPTP is not high on such lists.
Special footnote for the UK and other Parliamentary democracies -- winner-takes-all electorates are a feature, not a bug, because of the fused executive. Somebody has to govern, in Westminster systems, that somebody is the majority party in Parliament. Proportional Representation is terrible at forming stable governments that can get any time to focus on the purely administrative side. Ask the Kiwis.