There was a Peter Cook show years back where he essentially did that and got everyone to vote via a black box on every little detail of governance. After a few month everyone was sick to death so he offered a vote where he would take all the decisions to take the load off them. And so became an absolute ruler.

A comedy with a serious point...

I was talking about voting in referenda not simply as a modern replacement of postal votes. Apart from the security concerns, the main concern I have there is that it a natural extension to use it in referenda.