For sure those progressive countries are already looking at this options. Not to save money but to make it more transparent to its electorate. On the other hand, there are those who opposes it, saying that we're getting totally dependent on the Internet. It's still a long way to go, but I guess its inevitable and we might see governments around the world slowly injecting it on their electoral process.
That is the good thing that elections polls can be conducted through blockchain and if that happens it can bring new better leaders to us but is the current governments can actually will let it happen? Since most part of the world's elections are in manual mode because if there is digital method they can manipulate it but when it comes to blockchain they really can implement it.