I wonder how many people would be happy to "delegate their vote" if there was some officially supported way of doing it.
This would be an interesting way of reimagining representative democracy in the digital age. Why should we bother limiting ourselves to a fixed number of representatives? Let everyone vote on everything _but_ let people choose to assign their vote to someone else.
Rather than electing representatives, I'd choose someone whose intellect and experience I trust, and delegate my voting rights to them. They'd become my representative. When someone accumulated enough other people's votes, they'd reach the political stature of people like senators.