It is a democracy, though one must distinguish between direct democracy where citizens vote directly on matters (like the system in ancient Athens or, to a certain extent, that established in modern Switzerland) and representative democracy, where the electorate votes people into power whom then make decisions on their behalf (supposedly).
While being a member of the government of this forum cannot be compared to being a member of the government of a major country on most levels, all power corrupts, as Lord Acton famously stated.
Therefore, it should be the responsibility of the individual members of government to do their utmost to ensure that they are not negatively changed upon being granted more power.