sbiddle:
What happens when the me me me me me millennial generation all decide to vote online for the fun of it picking some random person that their friends all talked about on Facebook just for lols? .. And then that person gets elected and are useless?
I know it's not really that different to people voting like sheep for the same GWRC people (maybe they won't now they realise they're all useless), but there are unintended social consequences.
The current system doesn't preclude useless people from being elected anyway; do some research on John Kirk and Alamein Kopu.
When people have real power, they will take voting seriously. Currently, it doesn't matter very much who your mayor our District/City councillors are, so there is huge apathy about local goverment elections. National politics aren't very different; a choice between two not very different packages of policies, and a choice between people selected by political parties.