Democracy doesn't preclude oppression or promote privacy. It also doesn't require that all citizens have the ability to vote, that all living in the country are citizens, or that citizens be free. Just like most forms of government (so far as I know, the only pure forms of communist/republican/democratic/etc government in current use are small scale town/village level, so this doesn't really mean much). I also don't have much knowledge on how most current governments work at any level of detail, so feel free to tell me if I'm wrong.